Originally I thought as you did and only went to 149 in the first block, and same goes for the width. But when I took the images into photoshop, I noticed that they were no longer each 218x150. They were all missing one pixel depending on which row they were in (eg 217x150 or 218x149).

If I do as you say then I lose pixel data from 149-150 on the grid and that isn't a good thing =) I think it helps if you think of the picture as a grid.

I joined the picture back up (of my car - the sample image) and it doesn't seem to be duplicating any part of the image, but I could be wrong because its hard to tell. Maybe I'll join it again and switch my desktop resolution to 640x480 so I can see for sure.

As for the chunk you mentioned above, yeah I should put that into a loop. I wrote the imager part seperate from the rest of the program and added it later - the code you posted was a quick test of Imager. I'll do that right away - I plan on making this a bit more flexible so you can adjust the croping etc.

djw