Simply conect to REC OUT (second above PHONES) to LINE IN to your
soundcard. Two 3.5 mm stero phone plugs on each end. I bet you can find it
in any radioshack.

As for soft I recomend MixW2 http://mixw.net/ and some from digimode
decoding from www.dxsoft.com (TrueTTY, SeaTTY, CWGet)
I tested these works fine with good-averande signals giving understandable
results.

good luck,
Edgaras
SWL 73!