when you can boot from the hd, the sandisk can be partitioned and formatted like a little hd device 'd:'.
if it is made bootable, a dos or win9x can be installed on the sandisk as an alternate boot device to a 'c:' prompt or to a stripped down gui.
if a second (slave) ide device is connected, the sandisk disappears.
one thing to do in the CMOS is to shut off the secondary ide controller and the irq for the Trident display controller to release the irq's for other devices.
use the oldest VIA chipset drivers you can find.
you may need to do a search on the internet for the Trident driver because Trident does not support the chip but other pc mfg's used it.
when you find the modem driver, the moden is an external 64k modem.
if you have the time, read all of the prior posts on the i-o boards.
keep having fun,