It is rather disappointing that Pacakage2You took ALL this time only to post same thing over again. I still don't think it's even possible to attach the particular recever/cable I received to the motherboard IR header regardless of how it's rotated on the pins. I tried to, by connecting the 5V, Gnd, IR RX to PS/2 Data line, but no luck. Then again there are still too many variables like BIOS config, those other Data pins, etc. When the OS "finds" IR device, I don't think it's because there is something hooked to the IR header, it's simply because the feature is enabled in the BIOS.
I don't know what my next step will be, there are still 4 unidentified data pins/functions on the receiver, but my best guess is that those are INPUTS for additional, traditional keyboard and moouse connection through the receiver as vaguely mentioned on the manufacturer's product page.
Another option is using only the mouse function on the keyboard, hooked to serial port (probably straight pin-conversion like those PS/2-Serial Mouse adapters, but that's a poor alternative IMHO, and only addresses the mouse).
Here is the pinout on a common PS/2 to Serial Mouse adapter:
ps/2 -> Serial Adapter
----------------------
data - serial rx
gnd - serial gnd
+5V - DTR
clock - RTS
Using this as example, and considering that the keyboard manufacturer DOES make mention of a serial adapter, I image this could be used on serial port (header on motherboard), but "probably" only the mouse. I don't know what the pinout for the serial port header is, I didn't see it listed in the manual but I would imagine that most contemporary ECS/PCChips/etc serial headers share the same pinout.
For some of you, having the mouse work might be enough. I will be looking for something like this
USB to PS/2 Adapter, and if i can't find one cheap enough, I'll probably end up using a
Mobility Easidock, which I was lucky enough to find posted here at ATF for FAR at Circuit City about this time last year.