If you still have the source files, are you able to add the font and other requires files to the folders that compile into the game so we don't need the RTP?
I run the game off a portable hard drive, as I play the game on friends' computers. It would be rude to install the RTP on every computer I wish to play it on.
To keep the file size small, only add the required files, not the entire RTP, into the compiled folders; if possible.