Update the Sample TWAIN devices README documentation.

SampleTWAINDevices/README.md

@@ -2,18 +2,47 @@
 
 Note:  You may need Administrator Rights on your system to get write access to the directories below.
 
+There are two general ways to install the 32-bit sample TWAIN drivers.  The first method outlines installing the driver automatically using the installer program.
+
+The second method is a "manual" installation, where you will copy the contents of the **sample2** folder directly to the Windows system folder.
+
+Only use the second method if for some reason, the automatic installation fails step 5) outlined below:
+
+### Automatic installation
 1) Run the 32-bit installer, [twainds.win32.installer.msi](https://github.com/dynarithmic/twain_library/blob/master/SampleTWAINDevices/twain_32/twainds.win32.installer.msi).  
 
 2) Go to the Windows system directory (usually C:\Windows).  There should be a **twain_32** directory defined there.   Note:  All systems running a modern version of the Windows operating system should already have the **twain_32** directory existing.
 
 3) There should be a subfolder with the name of **sample2** that was created.  In the **sample2** folder should be a file with a **.ds** extension.  This is the main file that the TWAIN Data Source Manager will communicate with when querying the installed TWAIN devices.
 
-4) To check the installation, you can run the DTWDEMO32.exe program [found here](https://github.com/dynarithmic/dtwain/tree/dtwain_apache/binaries), and see if the scanner shows up in the "Select Source" dialog when selecting a Source.
+4) To check the installation, you can run the DTWDEMO32.exe program [found here](https://github.com/dynarithmic/dtwain/tree/dtwain_apache/binaries), and see if the scanner shows up in the "Select Source" dialog when selecting a Source.  
+
+5) Using DTWDEMO32.exe, attempt to acquire to a bitmap by selecting "Acquire Test -> Acquire Native" from the main menu, and check if the user-interface for the TWAIN device shows up. The user interface should look similar to the following:
+
+![twainimage](twainimage.jpg)!
+
+If there is an error displaying the user-interface above, then a manual installation of the driver may be necessary, outlined in the next series of steps:
+
+### Manual installation
+
+1) Go to the Windows system directory (usually C:\Windows).  There should be a **twain_32** directory defined there.   Note:  All systems running a modern version of the Windows operating system should already have the **twain_32** directory existing.
+
+2) Copy the contents of the [twain32 folder](https://github.com/dynarithmic/twain_library/tree/master/SampleTWAINDevices/twain_32) to the C:\Windows\twain_32 directory.
+
+3) To check the installation, run the DTWDEMO32.exe program [found here](https://github.com/dynarithmic/dtwain/tree/dtwain_apache/binaries), and see if the scanner shows up in the "Select Source" dialog when selecting a Source.
+
+4) Using DTWDEMO32.exe, attempt to acquire to a bitmap by selecting "Acquire Test -> Acquire Native" from the main menu, and check if the user-interface for the TWAIN device shows up. The user interface should look similar to the interface shown in step 5) in the **Automatic installation** instructions.
 
 ----------
 
 ### Installation instructions for the 64-bit TWAIN device
 
+There are two general ways to install the 32-bit sample TWAIN drivers.  The first method outlines installing the driver automatically using the installer program.
+
+The second method is a "manual" installation, where you will copy the contents of the **sample2** folder directly to the Windows system folder.
+
+Only use the second method if for some reason, the automatic installation fails step 5) outlined below:
+
 1) Run the 64-bit installer, [twainds.win64.installer.msi](https://github.com/dynarithmic/twain_library/blob/master/SampleTWAINDevices/twain_64).  
 
 2) Go to the Windows system directory (usually C:\Windows).  There should be a **twain_64** directory. If there is no directory named twain_64, create the directory (so once done, there will be a C:\Windows\twain_64 directory), and add **C:\Windows\twain_64** to the system PATH.
@@ -24,4 +53,20 @@ Note:  You may need Administrator Rights on your system to get write access to t
 
 5) To check the installation, you can run the DTWDEMO64.exe program [found here](https://github.com/dynarithmic/dtwain/tree/dtwain_apache/binaries), and see if the scanner shows up in the "Select Source" dialog when selecting a Source. 
 
+6) Using DTWDEMO64.exe, attempt to acquire to a bitmap by selecting "Acquire Test -> Acquire Native" from the main menu, and check if the user-interface for the TWAIN device shows up. The user interface should look similar to the following:
+
+![twainimage](twainimage.jpg)!
+
+If there is an error displaying the user-interface above, then a manual installation of the driver may be necessary, outlined in the next series of steps:
+
+### Manual installation
+
+1) Go to the Windows system directory (usually C:\Windows).  There should be a **twain_64** directory. If there is no directory named twain_64, create the directory (so once done, there will be a C:\Windows\twain_64 directory), and add **C:\Windows\twain_64** to the system PATH.
+
+2) Once the twain_64 directory exists, copy the contents of the [twain64 folder](https://github.com/dynarithmic/twain_library/tree/master/SampleTWAINDevices/twain_64) to the C:\Windows\twain_64 directory.
+
+3) Check in the C:\Windows directory for a file named **TWAINDSM.DLL**.  If the file does not exist, copy the version found here in the twain_64 directory to C:\Windows
+
+4) To check the installation, you can run the DTWDEMO64.exe program [found here](https://github.com/dynarithmic/dtwain/tree/dtwain_apache/binaries), and see if the scanner shows up in the "Select Source" dialog when selecting a Source. 
 
+5) Using DTWDEMO64.exe, attempt to acquire to a bitmap by selecting "Acquire Test -> Acquire Native" from the main menu, and check if the user-interface for the TWAIN device shows up. The user interface should look similar to the interface shown in step 6) in the **Automatic installation** instructions.