lol i already quit on making a skin, but i can help you.
well you gotta do the following, in order to open AIMG or BIMG:
-make sure AIMG and BIMG are in a folder with a short path. for example C:\001
-with cmd, go to the folder where you copied VDK
-type these:
vdk start
*enter*----->this means press enter

vdk open 0 C:\001\AIMG (or C:\001\BIMG) /RW
*enter*
vdk link 0 0 Z
*enter*
now you should have a new local disk in my computer.
BTW every now and then windows will pop up a "low disk space" balloon. just ignore it.
when you're done:
-make sure you have closed all windows related to that new local disk
-again, point cmd to the VDK folder
-type:
vdk stop
*enter*
you should get a message "the virtual disk image service was stopped successfully" or something like that.