Not a terribly complex question - I've got some knee problems (chondromalatia) that basically make it very hard for me to do any kind of squatting-type movement. While, obviously, I'm in the process of trying to fix it, at the current moment my gym routine (that i used to drop 8 kilogrames since Jan) is some messy 30 minute cardio+ machine lifting fully body circuit.

What are my outs of the situation? I figured out I'm wasting my time on the gym and, despite the loss I'm still not looking any good (80kg atm) - but any serious freeweight routine requires me to, at the very least, do squats and deadlifts, both of which are impossible to do in my current situation.

Any advice welcome. Cheers!