I'm a complete novice when it comes to running but I'm with TK on the Couch to 5K training because it truly works. Take it from me, I started it in late September and was able to run 5K in 8 weeks. Since you're not quite a beginner, I'd recommend trying the
Gateway to 8K training. It alternates from jogging to walking but it gets you to where you want in 10 weeks. If you have an iTouch or iPhone, there's a nifty application that helps tremendously, you can find it
HERE. The nifty thing about the application is that you hear a ding when it's time to move from running to walking. If you don't have an iTouch or iPhone and don't mind the music, go
HERE. The playlists give you prompts when it's time to go from walking to running.
All you need is a little dedication and you're set, sounds like you're already motivated. Good luck!!