[kh99]

Right, but the problem with a list is that it wouldn't contain possible custom script values. I suppose I could have a dropdown and a text area for "other".

Edit: well, I just did a search and found nearly 100 THIS_SCRIPT values - That's quite a list to be choosing from, especially if you want to allow multiple selections. I might just have to go with a text field. But I suppose I could also accept the php file name and build an array to lookup the THIS_SCRIPT value, that way you wouldn't have to know it (which is probably a common problem for people who never look at the source code).