I have the installer dvd for a g4, 10.4 server

It will not pot or mount, unless i stick the disk in after os 9 has loaded, the only way i think i could install it is to install 10.4 client then, server,

but if i do that i would want to use 10.5 server, but i do not have the disk for it and i am not downloading it, ( I am legal towards apples sofware)