This should be fairly easy.
all you need, aside from a cassette player, is a cable
that connects to the "Line Out" or "Headphone" jack on
your cassette player, and at the other end connects to
your "Line in" or "Microphone" jack on your sound card
(preferably to the "Line in" jack), and any software that
can do sound recording. there is one that comes with W2K,
called "sound recorder" (you'll find it under Start-
Programs-Accessories-Entertainment), but there's a catch -
it records in chunks of 60 seconds and not continuously
(last I checked, but you can check it out yourself too).
what you can do is search and d/l of the internet freeware
that will allow you to do sound recornding.
next, you have to make sure that on your sound properties,
the input you are selecting to record from (i.e. the "Line
in" or "Microphone") is selected and not mute. for that
you can double click on that small yellow speaker icon on
your system tray, than "options" from the top menu,
then "Properties", select the button for "Recording", make
sure that your desired input is selected, and t hen press
OK. you should see a volume button for your desired input.
make sure it is selected at the bottom as well.
now all you need to do is to start yoru recording
software, play your casseette and record to the format
desired.
hope that helped
Alon