Ok, I dug out the source code and released the version with aircraft skinning.
Unfortunately, I don't currently have time to do masks for all the airplanes, so I just included a single proof-of-concept icon.
If anyone has (or is willing to make) aircraft masks, it'd be great if you could share them. If you drop me a PM and/or upload them in this thread, I'll gladly include them in the next DCS release (credit will be given).
The new version includes:
Solid color preview backgrounds
Batch processing (This one works, but is a rough implementation - the application will "stall" if you process a huge batch of icons at once - I'll throw a "Please wait" window in there if I find the time, but I thought I'd better put the version out before I forget about it again.
Just be a little patient and DCS should throw out everything you requested ... eventually.
If it does not, please report back so I can try and fix things.
The download is in the first post, but here
's the link again.