Assistance with adding a few fields to the project form

Hi There,

I'm pretty new to PHP - have developed in IBM Domino and ASP though, so the concepts aren't completely foreign.

What I'd like to do is add 'Category', 'Status' and 'Project Focus' fields to the Project form - they will be drop-lists, with static content i.e. no need to add extra db tables etc.

I have no idea where to begin...I've looked through the files, and simply cannot find out where the Project form is created (prob being an idiot...) or where it gets submitted etc.

Is there an architecture overview for pP?
Or a development guide?

Thanks for any assistance,

Regards
Grant