Well in order to record your guitar well, there are three methods, that i know of, these are:
1) You buy a device such as the Johnson J-station (I reccomend) or
the Line6 POD. These can connect to your sound card through a S/PDIF digital port, and will produce, with the right sound card, a proffessional sound. however this would cost $150 for the j-station and a further $79 for a compatable soundcard such as the Sblaster live! or for 24bit recording $179 for an audiophile 2496.
2) The more feasable and perhaps inexpensive method is to buy a microphone (see the microphone forum for an appropraite one) and mic your amp (see guitars + basses forum for more info) This can produce a great sound, or a terrible sound, it all depends on your soundcard and which mic and amp you use. However the only cost would be the microphone, and an amp if you haven't already got one.
3)I have never tried this, but have heard the sound it produces, and it aint good, but it's the cheapest of the three. There is a cable which connects the guitar into the line in on your soundcard. I know nothing about this, i just heard a guy using this method on netmeeting. I dont know what cable he used but i'll try and find out for ya. But it was really crap quality, and i don't think it was a cable specifically for this.
I would suggest the 1st method as it enables you to edit your recordings and change the sound around alot. Also the J-Station is a great gadget to own
www.johnson-amp.com/jstation.htm also it's all recorded digitally and if you choose the audiophile or another 24bit soundcard then its at a proffessional level.
What guitar/setup you use?
regards
aL