i have an a500 with the 2.0 rom chip upgrade from 1.3 with a great valley products scsi plug in hard drive with 9 megs of ram and the 512k expansion in the bottom slot. im running an apple cd rom drive off of the plug in hard drive scsi interface card. i have a software-hardware device plugged into the parallell port for ntsc video and artwork program made by DCTV. when i go to boot the computer it asks for i guess the systems disk but does not boot. is this the problem or is it asking for the harddrive install system disk. i have all the installer software for everything, but no go.