After my last post, i decided to try again and found a solution. You need to know a bit of mandrake to do it correctly.
1. Boot the first CD of mandrake, and when you see "Press F1 for more options" do it.
boot: expert noauto
(i am unsure if its noauto, type F2 for advanced options and check for something that says that you must prevent it to auto detect hardware)
once that is done, follow the instructions on screen. It won't try to detect what made your linux crash previously, but yet, that is if you had the same problem as me.
I hope you'll get to install linux and good luck !