Did you know that you no longer have to remove the boot ROM in order to flash his CFW? You don't need a programmer. Just put his v2.00 firmware on your CF card and it will flash the boot ROM for you, then upgrade to the latest version after that (currently v2.02 as of this post).
He's not hard to contact, he posts semi-often on the NesDev forums. That's how I learned of his CFW, specifically this thread
(his handle is Ramsis).
He does say that removing the boot ROM to reflash it is the safer way to install his CFW, since an unsuccessful flash will brick your PowerPak. That's true, but it wouldn't be a permanent brick, you'd just have to send the boot ROM out to some one so they could reflash it for you. Or, if your boot ROM is socketed, there's plenty of places you can get the chip pre-flashed for you. DigiKey offers this service, and stocks the SST39SF010A (older SNES PowerPaks used AT29C010A, but that part has been phased out as far as I can tell).
All I can say is that I've used his v2.00 software to flash my PowerPak and it worked perfectly. I immediately upgraded to v2.02 and couldn't imagine ever using the stock menus again. In fact, I have a hard time using my NES PowerPak now. I wish some one would come along and do to the NES PowerPak what Ramsis did for the SNES PowerPak.