Both the firmware and test firmware for the v3 mod in the wiki, are linking to pages that have been removed, i.e. there is nothing there that can be downloaded.
The test firmware (for v3) is not out, at least as far as I know.
The firmware for v3 that is currently posted in the forum is short of a few bytes (13 bytes I believe), and will not upload correctly depending which tool you are using to flash the pic. I believe the correct checksum for it is 0xed60 (from memory, don't quote me, I'll correct the post if it is not the correct value) and if after loading it to whichever tool you are using to flash the pic, you see a different value, do not flash it. Instead use a different program to flash it, or load an older firmware first in memory (to set those missing bytes), then import the latest firmware.