WoW! Truly amazing to get so much feedback so quick. Let me see if I can cover all the answers to all the above posts...
Firstly yeah the 2.7mph is more a fast walk. I'm kinda concerned to go full on run as the treadmill says right on the front, "Supports Weight Up To 250lb". Seeing as I'm almost 300lb I didn't want to break it, and I figured from the old adage, you have to learn to crawl before you can walk, I could infer I need to learn to walk before I can run. However that's the main reason I wanted to ask some people with real knowledge am I burning more fat running for 15min full speed, or is it better to go 40min at an intermediate speed?
Secondly, yeah I am doing this for my wedding, but I want to maintain my fitness long after that. I think for most people who decide to get in shape there is some major catalyst, some wake up call where you're like, "damn I can't live like this". For me it's not just about looking good in my pictures, I mean that's part of it

however i'm more thinking about my future kids. I want to be able to keep up with them, I don't want to be that guy who goes into full on sweat just from walking up a flight of stairs. Moreover I want to give my kids the building blocks for a healthy lifestyle as well.
And lastly yeah I've had some pretty bad eating habits. I'd drink soda's all day, fast food lunch, get in late and have a big dinner right before I fell asleep. I work a desk job so my only activity was walking to the car and back. I'm 28 now, so I've been through all the fads, the miracle pills, the super weight loss diet plans, the fat blasting machines. I know the only real way to loose weight is to watch what you eat and exercise. I just haven't been doing it because, well fatty foods taste better and exercise is hard :boxing_smiley: But I've indulged enough, it's time to make that change. I've just been slapping the snooze button on my health, but I'm ready to start my new life.
In the past I did do some drastic things to loose weight. It was actually for my prom, I just did nothing but drink water and take Ephedra pills (back when they were leagal) for 19 days! And it worked I dropped the 50lbs I was looking for. However it did leave me with a lot of loose skin and stretch marks, which I absolutely hate to this day. I know I can't go that hard core again. However in order to shed the pounds faster I am cutting my caloric intake significantly.
My current regimen is an Ensure for breakfast, Ensure for lunch, do my workout, before my shower I have my GNC Vitamin shake with a couple spoons of protein powder in it, then for dinner do some boneless skinless chicken with some greens and whole grain rice. Then once a week I have a cheat meal, by that I don't mean fast food. Just something besides boneless skinless chicken

I know that's not super healthy, and after the wedding I'm dropping the Ensures and replacing them with meals, as well as diversifying my dinners. Hope that gives everyone a little more insight into what I'm going through.