All sorts of ways
Basically you need an outlet from the cassette player (ext LS or phones) which you connect to line-in on your pc sound socket.
You then record on your pc HD and later copy these to a cd.
Good impedance match between player and sound card. May be necessary to buy a preamplifier from Maplin to avoid poor quality from a mismatch.
File handling needs software, but free Audacity can be downloaded and used in recording and simple editing.