After i installed a new boot screen, the mandriva boots ok but after everything loads, the desktop hangs, and nothing works, with exeption of mouse cursor.
Sounds like you have X working but no desktop environment or window mgr running.
However, if i log with the guest login, it works fine.
Then you have messed your xinitrc
I don't use Mandriva, see if you can start your DE or WM manually. GDM or KDM.
Or can you Ctrl+Alt+F2, login, and then run startx
and get your GUI up.
Then fix your ~/.xinitrc
Reason for edit: Spell check and Syntax