Sorry to double post, but I do have the answer to my question, and wanted to be clear on that. Not only can you move maps over, as detailed above, you can rotate them as well

The trick(s):
Take your desired map. Save as an RGB image. Open in MSPaint. Select a background colour, ideally something on or near the edges of your image. This works great with water for islands. Otherwise you'll need to take away land. Check your properties, and add 32 pixels to the height and width, or, if using a land region, take away 32 pixels of height and width.
Next, flip the image. First vertically and then horizontally. Or do it horizontally and then vertically if you wish, so long as you use both once.
Then add (or take away) another 32 pixels for both height and width.
Lastly, flip everything back.
You can do any sort of adjustment you want, so long as the total number of pixels you are adding (or taking away) on each, the width and the height, equals 64. Hence you can do 12 and 52, 1 and 63, 23 and 41, etc.
For rotation, simply open the file in any image editor that can rotate photos (I just grabbed a random free one I found by googling) and rotate the desired angle. Next, open that image and ensure the background (your image will be surrounded by triangles, all pointing outward) matches your "background colour" that you desire. Note: this can be VERY hard to do with land tiles. After that you simply want to open the file in MSPaint, move it about so it's near the upper-left corner, and chop off all the extra space you have. In order to make sure everything works, ensure your final width and final height equal something divisible by 64, plus 1. A calculator should tell you it is XX.015625. For example, 1857/64=29.015625
If you don't have this .015625 you need to add or take away pixels until you do.
As such, this is how you "move a map over, just a little bit"