I can't install it on Windows 7 either. Visual c++ hangs in the same manner. I tried installs as vista and got an install window from xtools and then an error again "unable to register the dll/ocx: regsvr32 failed with the exit code 0x3" No luck after 6 tries.
Other Data East products
With CarryMap you can make your ArcGIS project mobile.
TAB Reader - Data East's input to ArcGIS interoperability capabilities.
Well Tracking - tools for management of well drilling data in oil and gas producing companies.
Personal IMS - Internet map server for publishing ArcGIS maps in Internet / Intranet.
JokerClick - extension providing easy access to the most frequently used ArcGIS tools.