Here are the links to what you will need to make your own:
1) ResourceView - used to extract/build .res files http://gpspassion.com/upload/MN6ResourceView.0.2.2.zip
2) PNGoutWin - this is used to optimize your PNG files so MN|6 runs faster.
You need to optimize before you put them back into a .res file. The trial
version of this software only does a 20-file batch job at a time... with
over 600 image files, I encourage you to purchase their software, not skip
this step. http://www.ardfry.com/pngo