I Started this thread to share some experience and hope it helps someone, After ive tried to Install Zeph's Leo on a ACER AM2 x64 4400 Machine with SATA Drive (320Gb) it didnt let me format the drive, so After a lot of CD's trying to Seek for a Answer i saw that UBUNTU Linux with its Live CD did actually gave me access to Mac Drives and Win Drives and i just saw there was like some kind of Encryption on the Beginning of the SATA HDD (abount 9 Gb) so with the UBUNTU Linux i was able to break all partitions and finally install Leo

Hope this info Helps anyone

I think that's the Acer recovery data for operating system, it's a hidden partition but should not interfere with your installation of Mac OS X.

Yes its the recovery, but actually did interfere as it didnt let me partition the Disc Nor Format it, anyways i left it the way it was... and install Vista over it, but thanks for the Reply