Shw: That's a neat way of doing it, I'll probably have a bash at it then over the weekend.
If the .exe you incbin along with the data is what does all the loading of the data do you have to add the length of the .exe to the offsets of what part of the file you need to seek?
My first thought was yes but then I though perhaps the ST may still think it's two seperate files instead of one big file which in that case the answer is no.