I haven't tried the "party" concept yet, but I might.
Even so, in the past I've used several paraliminals together, and they might make a nice "party package."
1. Ideal Weight (both "sides")
2. You Deserve It
3. Instantaneous Personal Magnetism (Note about this one: you can use it for much more than just magnetism. It asks you to choose a role model type of figure, which you then step into for a few moments--this is a huge and powerful technique for anything you want to do. I chose a friend of mine, who lost almost 70 pounds.)
4. Perfect Health (because you want healthy weight loss, and because being trim is also healthy)
5. Self Esteem Super Charger
You might think of others that resonate with your particular situation. One of the new ones, Success Built to Last might also apply, but I haven't tried it for that purpose.
Best of luck with your project!