Now you understand why I need such a tool, right? :ugly: What I am saying is that I need to remember what the lookup values are for each block definition then somehow translate that to whatever the new lookup name may be. In other words if the "1 Height" case actually refers to a "6' H Bay" and I get feedback from our planners that It is more intuative to have the lookup value read as "6' H Bay" than "1 Height" then I need find all of the blocks that are set to "1 Height" then change the lookup name to "6' H Bay" then reset all of those block to the "6' H Bay" value. When I read your post I wasn't sure I understood it so I explained it again. Is this what you meant? As far as your comments about "HEIGHT 4 and 5" I know I will have to build these combinations manually. I just want this tool for updating my existing combinations and keep them from reverting back to the first lookup if I need to change the names. Post what you have if you think it is working and I will test it and give feedback. Thanks