i have a road runner connection in the house already. i cant run a lan cable to the location i want to run a pc on the internet easily. i already have a cable for tv run to the outbuilding. can i buy a cable modem and just hook it up? i dont want to rent 1 from rr. i've tried the modem supplied from my isp out there and it works fine. i'm not sure if a store bought modem will ping the isp correctly without the isp's knowledge. i know a router would be the best way to go about this. but running the lan cable would be very difficult. and swithing my whole network to wireless would be far more costly. this is probably an easy problem for you guys to help me fix.

thanx in advance for any help.

mike