Welcome John!
As far as cutting 20 lbs by June, that may be pretty rough considering that that would be about 3 lbs or more a week lost, while recommended amount of weight loss is 2 lbs a week max.
Different ways you could cut are
Layne's Sticky in the Nutrition Section
http://www.bodybuildingdungeon.com/f...mbination.html
Post on Carb-Cycling posted by Mindstar earlier today.
Carb cycling
Another option is CKD (probably the roughest out of all three).
http://www.bodybuildingdungeon.com/f...-cyclical.html
Workouts, I wouldnt advise putting a time constraint on them, unless you've only got that amount of time to accomplish what you need to in the gym. Just my .02
Now after all that, care to show you're diet and current routine? Again, welcome to the dungeon.