Stitching bmp's in PS

I was hoping someone might help me out with stitching adjoining bmp quadrants together in photoshop.
I can’t figure out how to get the exact adjoining quadrant to build. Is there another way to build adjoining quadrants other then using the explorer mode and the pick tool?

Ok just answered my own question. You can bring up world size and positioning from the pull down menu while in explorer mode and just click on either axis so I guess it’s all about the numbers it looks like 12 clicks does it.