Yes, it will work, but only up to the speed of your USB 1.1 port. |your computah has a USB 1.0 port, you are limited to exactly one USB device on this port. I've also had problems with wireless devices and USB hubs. Get a USB2 card for the computah.
As for 8ft, it should work just fine. If your wireless client utility shows a lousy signal, then something is busted. It's difficult to tell from here where it's broken. It could be the unspecified wireless router or the WG111. I suggest you try your computah with a different access point such as the neighbors. Also, drag in a friends laptop and see if it goes farther than 8ft. That should at least identify which end of the wireless link is the source of the problem.