The URC-1629 appears to be used in Foxtel  setups.  I don't have a list of setup codes for it, but TV 2341 shoots the NEC1 IR protocol, device 0.191.  TV 1363 and 2098 are other possibilities.

You can search for the correct function numbers-- there are 256 possible EFCs ranging from 00000 to 00255.  It doesn't take as long as it might seem.  Here's how to try:
Use the 2341 setup code and for each test:
1)Press Magic (the button you would use to change setup codes).  Don't hold it.
2) Enter a test EFC, holding the 5th digit.  The remote will send an IR signal.
If the TV responds, write down the EFC you entered and the function it performed.
To verify that the procedure is correct try this with EFC 00056.  I think that should toggle the Power, but I could be wrong.  

This procedure should work for many functions, but for example you may need to be in menu mode before the arrow commands will do anything.  So it may take a couple of passes to find everything.

You can semi-permanently assign these EFCs to buttons of your choosing:
1) Press Magic until 2 blinks
2) Enter 994 (2 blinks)
3) Tap Magic again (don't hold it)
4) Enter the 5 digit EFC
5) Tap the button you'd like to perfom this function.
The remote should blink twice.