That's the way :-). Thanks for tips, it was exactly what I was looking for.

I am not used to Maya at all, I just have to make some scripts for a project I am involved with, and I have to figure out MEL on the way. I have already cooked together part of the gui to choose fonts and files, but I will now see if I can source this file you are pointing me too and just add an extra button and text field to it.

Thanks.