Rimzim, Yes it is possible with some coding. You can have a usertype field populated by your registration form.

No. flexreg adds to the registration form. You do not need to include the default fields.

Quite a few of my clients are using flexreg without trouble so I have no idea what could be causing your problem unless some other plugin is interfering.

I've got a long registration form that I've completed quite a lot of times while testing, and have had no problems with it.

Ive tried this plugin it works well but when i login as registered user i cant see the link search page menu or much better this will integrate in the default elgg search function at the topbar. becoz i want this tool for our alumni, like selecting year graduated and searching them by year graduate by simply type 2002-2003 in the search box at the top bar.