for generic bt878 driver, go get
Btwincap
It is the best generic driver for winxp/2k system with bt878 chipset. I have been using it for a while, and there is really no reason to use manufacturer's less optimized/ outdated driver if the card is just generic bt8x8 design.
This will work with the cheap card posted above and should be the best driver available besides dscaler. However, a little basic reading and installation skill is needed to get the driver installed right. So, if you find it hard to install seperate driver, tweaking hardware with driver or need help in simple software installation, this card and driver is simply not for you.