I've tried lot of things but nothing, i've formatted.
By the way, there where other guides that mabe could help fix (Ubuntu Official Guides -> Super Grub Disk)
I just want to tell another thing that happened to me.
After the winxp installation CD boot i've seen the partition "Lost". I've formatted it as NTFS (Fast format) and i've installed WinXp.
When i got back WinXp up and running (Brand new.. wow.. it's fast !) i've installed grub (Boot Edgy Ubuntu cd -> fix broken system -> reinstall grub)i was unable to see the other Disk on my pc, a 160Gb divided like this:
Partition Magic could not fix it, Ubuntu Dapper Live CD could not see and so on.
/hdb1/ ntfs data (From internet, isos, bla bla)
/hdb2/ Slackware Root File System (ReiserFS)
/hdb3/ Home for Both Linux Ubuntu & Slackware (ReiserFS)
I used testdisk
With both test disk and cfdisk the partition was "Fat16" bla bla
sudo apt-get install testdisk
Launchin' on TESTDISK the "Analyze" command after a secondo he showed me what i wanna see! My disk like it is!
I've wrotten the changes.. and here i am, after rebooting, on my Ubuntu Edgy XGLed on a GeForce2