I've noticed that people have givin me props and I would like to give people props that have helped me out so how do I do this
...you'll see a little balance scale at the top right coner of their commet, it's called rep, click it and you can also leave a comment with the rep you give.
For anyone else who might still have questions: http://forum.grasscity.com/general-feedback/348087-reputation-faq.html