Registry Key Name with spaces in it...

I have a registry key whose name is "SereneScreen Marine Aquarium Lite_is1"; It's an uninstall key, which I need to access. I am using the Wow64 plugin, and getting a "the specified sub key does not exist." error.

I've tried a variety of SessionVar.Expand statements, like this:
SessionVar.Expand("%ProductARPRegPath%").."\\"..Se ssionVar.Expand( "\"%ProductARPKeyName%\"" )

with and without extra quotes; can someone tell me how I need to piece this together to get at this key?

Thanks in advance!
DDoutelMS