Heres what I do If you have an Iriver mp3 recorder (700 or 800) series..... 1st you need a 1/4 " to 1/8" adapter for the haedphone jack on the cassette player then using the iriver simply play the cassette and record to the iriver
This automaticly converts to a mp3 format that most computers will burn to a cd. You can find the irivers on ebay for a fraction of the cost on them new. Must be the 700 or 800 series.
Chris