Could you be more specific as to what you are trying to do and exactly which disc you are asking about.
I when you say "G5 or Tiger software first" you are referring to the system disc that came with the G5. You are not clear at all about this. If the G5 came with 10.4 aka tiger then just use those disks. Did you upgrade to tiger later? Again you never said. If so you can just reinstall the OS from the tiger discs.
sorry about my unclarity. i found out the (3) G5 discs included OS 10.3.9, and the OS X Tiger disc had 10.4...so you're right, all i needed was the (1) 10.4 Tiger disc. from the way they were labeled, it made it look like the G5 discs had software specifically for the G5, so i was unclear which ones to load.
thanks for helping out a bonehead!
dual 2 GHz PowerPC Mac G5
2GB MB DDR SDRAM
GeForce FX 5200 graphics card