Someone pointed out metamorph to me to change our themes on the fly
if your using it or trying to and are stuck at the unable to open .zip make sure busybox is installed /system heres the fix assuming busybox is installed
you must be rooted!!!!!!!
download metamorph from market
download andexplorer from market
link cp with busybox- open adb shell type the following
ln -s /system/bin/busybox /system/bin/cp
now metamorph should work
Do not apply any theme without a good nandroid backup
I am not reponsible if you botch your droid !!!!!!!