question: is it possible to split an ethernet line? I tried to do that yesterday but it wouldn't work.

Because ethernet uses only 2 pairs and cat5 has 4 pairs it is entirely possible and more economical to run two computers on one cable. I see it done in univesities and lots of public schools... Usually techs that use jumper wire systems do this on Bix!
Apparently there is more than one way to skin a cat5 . I do it all the time ! aok