Set your pictures in a composition in a sequence, all the same duration. Check AE help for "Sequence Layers"
Set that composition in another composition and enable time remapping. Check the AE help for info on Time Remapping.
Then, rather than just using keyframes to adjust the time go into the graph editor and play with the motion graph. Again, use the AE help as a reference.
Playing around with it will eventually get you where you want to go.
> I hope this all made sense. Thanks again!!<
None at all.
Look up "exponential scale" in the manual. It is a calculation you can apply to any two keyframes. You could create a sequence that has all of your stills in it and precompose it, enable time remapping, apply exponential scale to the first and last keyframe.
Thanks! I will look into that!