I bought programs from Magix and Roxio to record LP records onto my computer. They worked, but they had problems. I recently switched to Audacity, and I find it's a much better program than the commercial ones.

You'll find a link for downloading Audacity here (click) - and it's free. It has a bit of a learning curve, but it's really not all that hard to learn. You have to have an adapter to plug your cassette player into the line input of the computer, but they're very common. Audacity will record from the cassette, and then edit and filter the sound, and then record it onto your hard drive. You have to use CD burner software to burn onto a CD, but most computers come with CD burning packages.

-Joe-