Alright, I figured out how the emuNAND Tool works, and was able to inject the NAND that I saved prior to formatting my NAND to install emuNAND... but, it was the NAND I copied from 4.5.0-10U, not 7.x.
Dammit. Lost my progress in PW - DD and now I have to redownload all of my everything. Last time I switch SD cards, that's for sure.
Do you still have the original SD? All you need to do is make an image of it, flash it to your new one, then use a program to merge the unallocated space to the main partition.
edit: You could use something like HDD Raw Copy Tool. I used it before when I swapped my 16gb microsd with android on it to a 32gb card for my nook HD+. Worked great and I just used any file manager program to get the other 16gb of unallocated space. (Can't remember what I used exactly, probably easeUS)