Before you begin, take a look here: How to: Install Fedora 17 on Windows 7 Dual Boot
: Before actually attempting the the dual boot, make sure that you have a solid backup of important data, just in case. I would recommend that you image your existing OS to an external hard drive before starting the installation of a second OS.
Bleeping Computer has a forum for Linux & Unix
. This would be the forum to ask any additional or follow-up questions in.