Sorry about that - I was doing some more testing after the deadline and realised what the problem is.
It needs to be run in a particular directory GRAC2:Sam&Max
In UAE mounting the folder as a hard disc named "GRAC2:" seems to work as did running it on my A600 - Naming an memory card GRAC2 and dragging the Sam&Max directory into there.
I'm sorry for the inconvenience
If anyone knows how I can fix this then please let me know.