i have been asked for the schematics in an private message - here is the answer:
normally one ir-receiver is connectet like this:


receiver plug
-------------------------------------------------------------

+5V ----------------------- Tip
Data ----------------------- Ring
GND ----------------------- Barrel

Code:

for 2 receivers this should work:

receiver1    receiver2                  plug

+5V  ----------------|
             +5V  ---+----------------- Tip


Data ---|<--------------------|
                              |
             Data ----|<------+-------- Ring


Gnd  ----------------|
             GND  ---+----------------- Barrel
i would use a low power shottky diode for the --|<-- (0.2V-Types). if you dont have these you should be able to use 1N4148-Diodes.
normally you can add much more receivers - it only depends on your standby-voltage.




the second question was:
is there any way to make girder relay infrared commands it hasnt got associated with an action,, i only really plan to have girder control IR gear from events from another application(with a few IR input events),, so events wont be triggered,via IR that often..., so it would be real handy to turn this moddfied UIRT2 into a kind of IR flooder,, so any IR signals that arent event triggers,, have girder relay the IR input back out to all the emiiters, just an idea if its possible...

should work with a little bit of lua.
you can add a command, use the girder event "all" and have to choose uirt-driver.
this command will be triggerd with every uirt-event. this event should be send via the uirt-driver (i dont know if you can pass this event through).
let me know if you get this to work (or not)