Do you have ROOT Explorer? You could go into system app, delete superuser apk and install the new one...
http://www.droidaftermarket.com/files/droid-root.zip
http://www.droidaftermarket.com/files/droid-root.zip
I have never used that..Christim is /system /app available through astro?
.........Yesok so then copy and move out to the sd card folder and past it there?