i think i'll have to just keep my eye on your development and progress with the script as i really can't get to grips with typing with the iPazzPort keyboard. i only use mine for for controlling a few functions with KMPLayer (and navigating around the desktop and windows explorer), so i haven't the patience to use the tiny keys beyond that. you must be a very determined soul to try and keep typing with the device - i think i'd just grab a full size keyboard.

i don't like admitting defeat so soon, though, so i'll try and give things another go when i can.
the only thoughts i have at the moment is that i'd maybe try to add a popup menu to a hotkey. the menu would then just list the keys and functions you don't require all the time, e.g. the function keys. but, if trying to remember lots of hotkey combinations isn't a problem then there's little point using a menu instead.
beyond that, i like the idea of the rapid keys, i just wonder if there's another way. if so, maybe i'll try to write a script and upload it.
edit:
i've been messing about using the script a bit more. i think the rapid key idea works very well as it's so difficult to try and hit two key combinations - which you had, obviously, already realised. maybe i'll try and use that with the KMPLayer controls - if so, i'll say how things go.