Inventory item modifying a custom profile field

[Ferrel]

I am really impressed and excited about myplaza. So far it works like a dream!

I need a little guidance, however. Obviously the module for a user purchasing a new custom title works. I love that feature and want to take it further.

Essentially I want to allow a user to purchase an item I create that will change the text field of a custom profile field.

I get the basics but I really need some direction. I figure a variable needs to be added into the code somewhere.

Any help would be greatly appreciated!