It sounds like you could be talking about either After Effects' or Photoshop's Puppet tool. Here are video tutorials on both:
- AE: http://tv.adobe.com/watch/digital-video/short-and-suite-im-your-puppet-im-your-tool-part-1 /
- Photoshop: http://tv.adobe.com/watch/understanding-adobe-photoshop-cs6/puppet-warp-in-photoshop-cs6-/
In Premiere, the closest effect I know of is Transform, but I don't believe that's nearly as flexible as the Puppet tools above.
Is this the same pair of maps, that you asked about in the PrElements Forum? http://forums.adobe.com/message/5459880#5459880
Did the suggestions there not work for you?
Exactly which program are you using, and which programs, like Adobe After Effects, do you have access to?
If you are using PrPro, and I understand what you want to do, then I would look at Linear Wipe, to see if it works for you.