What would be an alternative to chins then? If you can't do chins that is. Not because I can't (They are hard for me regardless) but because I have no where to do them.
I could never do dips, pull ups and wide grip chin ups, but i've been passing the bars at the gym every day trying to do a few, over the last few weeks i can now do 4 full dips, 3 pull ups and 2 wide grip chin ups. Just keep trying, there's no alternative, I did think doing loads of lat pull downs would get me better at them but they never did. Use no assists and just go for it, even if you do a half, next week you'll be able to do one if you keep at it.
edit - Thought i'd just post where I'm at,
I normally do 45 mins straight cardio every weekday (15 mins run, fast enough that i have to stop at around 10 mins to catch breath, 15 mins cycling and 15 mins cross trainer)
This is my best at the moment
Bench - 60kg 2 x 8
Incline Bench 45kg 2 x 8
Decline Bench 65kg 2 x 8
Squat 90kg 4 x 5
Deadlift 70kg 3 x 8 (really have to get my form sorted on this one)
military press 25kg 2 x 8
Bent over row 35kg 3 x 8 (Really need to work on my back)
Lat pull downs, seated row, bi's and tri's I do on cable machines with numbers not weight so cant remember, I just keep going higher until I can just do 5.