i've found pci devices to be a bit more reliable to USB on older systems (and OSs).  either may work fine though

Either one should work. The USBS adapter has some advantage in that you can move it a bit, if necessary, to improve signal strength and you don't have to open the computer case to install it.

Steve

Thanks,

Since my daughter will be doing the install, will probably go with the USB......

dang, forgot to add: USB 1 is NOT capable of 802.11g speeds

so if you don't have USB2 it's something to consider