Thanks Rob - I'm glad it has been of some use to you.
The file Mike has provided the link for is a zip file with all the components for RGBSplit, so people won't have the problem you originally had with missing system files. Unzip the file to a directory on your hard drive and double click the setup.exe file. RGBSplit will be installed on your PC. If your PC lacks any of the required system files the installer will copy them to the right place on your PC.
Open RGBSplit by navigating to Planetary Tools | RGBSplit in your Start Menu.
There is a 'walkthrough' for RGBSplit in this thread (Post #2):
http://www.iceinspace.com.au/forum/s...t=10677&page=3
This is a 'Final' release in the sense that it is the end of the beta testing phase. I will be looking at improving a few things in RGBSplit once I have the ppmcentre front end 'bedded down', so there are likely to be more releases. If you have any suggestions for RGBSplit, drop me a line.