First I wanted to say I downloaded XOOPS and loved it right away! Theres alot of CMS out there but they were lacking in areas. Ive tried almost all CMS's. When I get my site up and customized the way I need it I will definatly send a nice donation to xoop.

I have a couple of questions. I need to customize XOOPS to work correctly for what im using it for. Im basically making a tutorial/forums site. I really need to customize the users information in xoops. This is critical for me because I need users to put what OS they are using and what version of "this software" they are using.

My question is how can I change this without messing up XOOPS and having worry free updates to xoops?

Thanks

You might consider modifying a module like xroster instead of the XOOPS user system. This way all you have to worry about is destroying an easily replaced (just delete and upload again) module.

Interestingly someone posted info about xroster at about the same time you were asking this question: here.