I know I just put up my tutorial on how to do this but hopefully this will make things easier for everyone. I'd still suggest doing a nandroid backup first just to make sure but I tested this on my phone so it should work. Just run the app and if this is the first time moving your apps to your sd card(and you want to keep the ones you have) leave the checkbox checked. Otherwise uncheck it. Then just press the buttons that correspond to what you want to do. Enjoy
In order to use this you MUST:
1: Have an apps-to-sd ROM
2: Have your sd card partitioned correctly with FAT32 first and ext2 second.
3: Have busybox already installed to /system/xbin
NOTE: I'll try to help as much as I can but I can't take responsibility for anything this does to your phone. I'm pretty sure nothing bad will happen and nothing irreparable can happen but gotta say these things just to be sure anytime I'm messing with root permissions.
ANOTHER NOTE: I'll put this up in the market for $1. It'll remain free here but people can donate to me that way.
YET ANOTHER NOTE: I've managed to get a new method working that's a lot more stable and flexible. I will keep this thread here but won't be maintaining it.
EDIT: Moving data is too unstable, I've removed the option. It doesn't force close anymore when you don't have the setup right, it just gives an error and wont let you do anything, so that's better.