Well, it seems that the attached package is all that you will need.
Extract the folder with all the files from the attached ZIP file. Then, copy three files:
to this folder.
Then launch NXModSuite.exe, go to "Video.bag viewer" button on the right.
Then, on the top, select:
1. File -> Load .IDX -> Select the video.idx file in your NXModSuite folder -> Click OK on the pop-up message saying that you need to load a BAG file.
2. File -> Load .BAG -> Select the video.bag file in your NXModSuite folder
3. File -> Load sorted -> Select the thing.bin file in your NXModSuite folder
Then, select the image you wish to modify, click Export button on the left bottom corner, select the NXModSuite folder and a name (well, I never changed the default name)
Then, edit the resulting file (it will be a BMP file) -> I used MS Paint (one with Windows XP and Windows 7 works well)
Then, when finished with editing, save it with MS Paint.
Then, go back to the NXModSuite program (I hope you didn't closed that?). DESELECT the image file in the program and select it back.
Then click Import on the bottom left corner, select the edited file.
Then, WAIT. The saving process can take a while, on a slow computer it took me some 3-5 minutes. The application seems to hang at this moment - but this is normal. Actually, the app is resaving all the 100 MB of the video.bag
Then, copy back to NoX folder the three files:
And try with NoX