I have a G5 that was on 10.5..5 Then went back to 10.4 by doing an "Archive and Install from a 10.4 install DVD (the one that one buys from Apple & is good for all computers). But now my applications will not work properly. My CS3 apps have reverted back to trial versions. FCP won't open. Disk Utilities says this version of OS doesn't support it. Anyone done the same thing and had no problems?