Sorry if this question is answered elsewhere, didn't see... I'm new to home recording, I have a four track cassette recorder which needs to be mixed down to a 2 track, can I use my regular cassette deck for this mix down. I'm not all familiar yet with the ins and outs, thanks for answering...

Which four track recorder have you got?

Depending on what you are using you have a couple of options here.
Feed direcly from the headphone jack to your 2 track with a shielded stereo lead (depending on the quality of your monitoring).
If your 4 channel has a stereo output then it's just a simple case of getting the right leads to make the thing work.
I really would need to know what outputs you have on your system.
If you are doing a fair bit of this kind of thing it may be worth investing in a small mixer and doing your adjustments through that.

As I've asked him what equipment he's got, let's wait until we know what we're dealing with before we jump in shall we?

For your information Mark, taking a signal from a headphone output is not normally the best option.

True, but if his system is truly budget then this is the only option he has.
Of course lineout into his soundcard is the best option.