Here is one that may be close.

Exported from MasterCook *
FAT FREE CHEESECAKE.
Recipe By :
Serving Size : 1 Preparation Time :0:00
Categories : Cheesecakes
Amount Measure Ingredient -- Preparation Method
-------- ------------ --------------------------------
2 Bars of ff cream cheese
1/2 c Sugar
1 t Vanilla
2 Egg whites or egg sub
Graham crackers for crust
Soften cream cheese and add rest of ingredients. Blend
until smooth and pour into crust. Could add lemon
juice and zest to make a lemony cheesecake. Bake for
30 minutes at 350 degrees.

There are a couple of flavored cheesecakes using Philadelphia fat-free cheese at the Kraft site below. Marigene's sounds like what you describe though.

Here is a link that might be useful: Philadelphia Fat Free Cream Cheese