Paul Bian wrote:
if i install 1.6 would i still be able to play 1.5/1.5 servers?
Well, that all depends on your interpretation of the bolded text. Do you mean to ask that if you install 1.6 (steam), will you still be able to go back and play your 1.5 version, or play on 1.5 servers from steam? I've never checked the second but I do know you can still play 1.5, I've had both installed before since my brother played on steam but I wanted to play with some friends who preferred 1.5.
I'm pretty sure that you won't be able to connect to servers running 1.5 using your 1.6 client. Again, I've never tried it but it would make sense that it wouldn't work.