hi all !
Demonbane, i tried what you said, i got the prompt and tried a grub-install, but it couldn't find some dependancies.
So i "cd" to some directories inorder to find what was going on, and i found :
i don't have /usr anymore... sure it wont works without that
so i guess i have to reinstall my system.
i think i will switch to debian in order to get more in the depth (with my doing-mess skills, i guess this will be a lot of fun
thank you for your help guys !