Hey Greg...
nice tip...way to think outside the box.
go to the effects panel.
search "transform" (found under distort)
can you add this to an adjustment layer?
http://help.adobe.com/en_US/premierepro/cs/using/WS1E7C690B-2342-43c3-9253-2BAAFF4168EF.html#WS455D57FC-0BB8-4ff2-B629-9AC78419A1C6a
Also PPro lets you save a combination stack of effects applied to a clip as preset.
http://help.adobe.com/en_US/premierepro/cs/using/WS40C519D9-F6AF-431f-B36E-...
Optionally when you save, you can save it with Keyframes set to scale.
this means if you make and adjustment layer segment with a different duration from your original elsewhere on the timeline....then apply the preset, the keyframes should be applied proportionally based on the different duration.
(it doesn't mean they will scale proportionally if you trim the clip...if you need to trim the clip duration, remove the effects and reapply the preset)
let's see what you can come up with now....I'm very interested....
Alex Udell
Editing, Motion Graphics, and Visual FX