No problem, glad to be of some assitance 🙂
Yeah I really liked my custom and coloured icons in 10.6! oh well. not much we can do about it.
just a note of warning, if you google coloured sidebar icons in mountain lion, there are many applications that claim that they fix it, but they are known to mess with os x and have broken people's installs to the point they have to reinstall, so i would seriously advise against using those.
However,that being said, applications like XtraFinder and Path Finder are Finder alternatives, which can allow you to customise your Finder safely. I have not had any issues with these applications so far. Just to let you know I am in no way involved in the products/companies, im just a happy user 😝. XtraFinder is free (here is a screenshot of XtraFinder), though less featured, it suits me much better than Path Finder, which is $40, but works as a completely separate application and allows much much more customisation.
I hope that helps.
xeni