Well I have made it to have dual boot, without touching the Vista Partition. I just installed with single boot with MBR in the new partition, then repaired the Vista MBR and added with easyBCD the dual option menu. It boots in both systems without any problem and without the need of the Leopard DVD.

Then I tried to upgrade to 9.2.2 but I got kernel panic, so I downgrade it again to 9.0.2 that was installed. I will dig a bit about this and try again.

Now I have some other issues, Toast doesn't seems to work. I have tried both 8 & 9 Titanium releases but both hang and stops responding. Is any know issue about toast?