I had a working Tiger (10.4.8), LEO 10.5.1 and XP triple booting from same HD. Lately I installed Zeph. 10.5.2 with MBR EFI. I managed to solve most of the problems on 10.5.2 (QE/CE, network, sound ..etc all ok). The only minor issue I still have is that my 10.4.8 stopped working (unable to boot into it), should I install EFI in the 10.4.8 partition as well?

Special Thanks to Zephyroth.

Thanks all.