OK, after a while making some new bin files (to include the volume control) and sorting out a nice skin for the remote, attached is a zip file for anyone that wants to add the twin to their slingbox.
[You need to use my bin files else the volume buttons won't work...]
A readme is present (in the bin folder) that explains how to install it..
I have NOT compressed the skin into an spr file as it doesn't work (yet)
I am conversing with a guru in order to address that, but this doesn't affect the operation of the remote..
Here's a quick image of the finished remote.
TM Twin OE Remote by CG121.zip
Just may come in handy for some