I'll have to pay $310 or so, but then Ill have my laptop back. Question still is: When?

In the meanwhile, Im here digging for info. So I can get my hands dirty on a project I will be starting on when my laptop is back. If anyone can help me out thatd be great.
So..

I need a program to record something.
It records in audio, not video.
It records without a microphone.
It records sound streamed by a computer.

Will I be able to achieve this by using normal audiorecorders like Soundforge? I havent got any experience with this you see.. ^-^;