Can't boot to install disks

[mini24]

Im trying to load my OS to another drive but my 10.5.8 wont boot to the OSX install disk. Tried going through the Start Up Disk in Sys Pref still wont, just keeps restarting. When booted to main mac hd it can read the disk ok, apparently, and if I try to install from that app on the disk it goes into restart... over and over again. Did try the C key (or D key whichever its supposed to be) to get it to boot from the disk.

Maybe there is something wrong with my disks or I read somewhere that a machine upgraded to 10.5.8 wont boot to an older OS disk. Is this right?

I was thinking I could pull the mac hard drive and put another in its place... if I do that and there isnt really anything wrong with my disks and I can boot to it and install that way... would that work?

thanks for any help...

 

[MisterMe]

Im trying to load my OS to another drive but my 10.5.8 wont boot to the OSX install disk. ...

Your Mac doesn't care which OS you have installed on your hard drive when you boot from a DVD. Your may use the System Restore disc that shipped with your computer or a retail distribution DVD for a version of MacOS X that is newer than the version that shipped with your computer. You cannot use the System Restore disc from a different model computer.