try this radio shack has a nifty little gadget that does work
http://www.radioshack.com/product.as...5Fid=278%2D785

a link to the schematic http://support.tandy.com/support_sup...oc66/66324.pdf

it's shack part number 278-785

just thought I'd throw in my .02 but in reality you can get a 4-5 port 10mb hub for a few dollars more.