Hi Troy
There are ps/2 to USB adapters available that you could get off dicksmith (or any other electronic shop). Just be wary that these are mostly meant for keyboards/mice and might not necessarily suit mounts (however I could be wrong).
http://dicksmith.com.au/product/XH4145/
From an electronics point of view, PS/2 connectors will have a different signalling protocol to USBs and you would need something in the middle to actively translate from to the other. Here is some general info from wikipedia
http://en.wikipedia.org/wiki/PS/2_connector
I guess you wouldn't truely know until you try it out. Electronic shops like
Jaycar have these adapters for cheap
http://search.jaycar.com.au/search?w...0usb&view=list
I would suggest visiting your local jaycar and explain to them what you want to do. they will be able to give you more advice and if it doesnt work, you can ask the guy if you could bring it back for a refund (its less than $10)
Some more info about the cable for your mount is here
http://www.cloudynights.com/ubbarchi.../o/all/fpart/1 (might be useful)
Hope this helps (I might be just giving you more garbage to cloud the day
)
Cheers and all the best mate