There's heaps of software that will record to your machine, the process is recording a 44khz wave file first (high quality) and then converting them over to MP3 using another tool.
I use Ulead's Audio Editor (part of Ulead Media Studio Pro 7.0) to record my audio, but these came up with a google...
www.fasoft.com www.goldwave.com If you're still getting the hiss with different software chances are you're getting EMI from some of the components in your PC and you may need to look at moving your soundcard away from the CPU into the lowest slot. You really shouldn't get hissing from a card of that quality.