Thanks to the extra keys on newer keypads, I was able to provide the Full Functions of a FrogPad: The only exception is Ctrl-Alt-Del, which is not allowed in AHK to avoid maliciousness. Not a deal-breaker, by far:

I used an AHK Script to handle the key/modifier presses and modes, adding a few beeps to the toggles: short high beep (single character shift), longer high beep (lock down) and low beep (release lock)
Besides the symbol key being off-center, and Shift moved to the side, it's a full clone! The extra left button is a "Clear" Key, to release any held-down modifiers
This layout is Right Handed, taking advantage of NumPadEnter's double width key for Space, The most-hit key on the pad.
If anyone is interested, send me your email and I can provide the Keycaps (to be printed on Avery sticker Paper, cut and attached) and the AHK Script that makes the magic happen.