How do you weigh now? 1500 kcals might be sufficient or wildly insufficient.
I'd suggest you take a look at the Get Shredded Diet by John Berardi. I did a variation of this for 3 weeks earlier this year to kick-start my weight loss for a competition cut. I lost a little more than 10 pounds and around 2-3% bodyfat in those three weeks. I gained most of the weight back, but not the body fat, as I tapered off the diet. I'm visibly leaner for having done it. I ate 1800 kcals a day, with all of about 60g of carbs, over half of which were fiber, trying to cut from around 185.
You don't really need all the supplements they listed - I got by with, basically, coffee, lots and lots of green tea, a multi, CLA, BCAAs/Greens+ powder, and willpower. It's hard but it'll work. I could have kept it up but I already dropped the weight I wanted in 3 weeks, and I figured out quick I wasn't getting down to the next weight class so I may as well come back up to the top of the one I was in. If I had to, I'm sure I could have done it for 6 weeks. Beyond that, you might need the Power Drive and so on he recommends.
Here is the article:
http://www.tmuscle.com/free_online_arti ... edded_diet
and here is a followup for tapering off of it (basically, carb cycling):
http://www.tmuscle.com/free_online_arti ... unshredded
Hope that helps.