4 Mb Flash Drive (these are odd - plugs directly into the IDE port, can set master and slave...I am figuring out how to use it in another computer)Integrated sound, video, ethernet, modem

60 watt PS which pretty much prevents using an off the shelf HD

All in a case the size of a hard cover novel.

Click to expand...

Use of a hard disk may be possible depending on how the 5V and 12V outputs are distributed by the PSU. A report on the outputs would be useful. If there is a decent +12V output (~10W or ~1A), you should be able to use a 3.5" IDE/P-ATA disk made in the last couple of years -- they are fast and use little power. Or look at low power 2.5" drives with an adapter.