Items and Category (ies)

[cniemann88]

Hey I am trying to figure out 2 things, and couldn't find anything yet, hope you can help me out.

1. How do I add an item to an maybe existing category (i am not sure if it exists). I know that if i use Category_SaveAndGet then it will just create a new category, but this is definetly not what i want. I know i can use Category_GetByName, but that throws a soapException if the cat does not exist, and i would rather not catch exception... is there something that returns a boolean ?
   I saw Category_Exists, but its unclear how to use this, since it takes picatID as a parameter, but i dont have that without getting that category first from the AC Database.

and the more important one for me:
2. how do you add multiple categories to a single item ?
I know that by using a csv upload file it would look like this: Jerseys|Jerseys > Kids Jerseys|Kids|Kids > Childrens but using otherCategories on the ProductTrans doesnt work, and carID is not an array...