mac mini wont load up

[flexo786]

hi
yesterday i was doin a total reinstall using os x 10.4 disks. it completed and i restarted and it loaded fast. i left it overnight and now for some reason it stays at the apple screen at the beggining. when i insert the os x install disks they dont boot up. how would i get it to boot up from the disks??

 

[flexo786]

cant get into it all. ive tried holding down c but nothing happens. i can hear the cd drive spinning but the screen still remains the same