Get your tape player with a headphone socket out.
Get a headphone jack to headphone jack lead ([broken link removed], ebay, etc). One end in the tape player, one end in the mic socket on the pc
record on the pc using something as simple as sound recorder.
(To open Sound Recorder, click Start, point to All Programs, point to Accessories, point to Entertainment, and then click Sound Recorder. )
Burn recording to cd using any burn software
If you dont have a mic in on the pc, try putting it on a recordable mp3 player and transfer recording to pc via USB.