Problem: Unlocked North America will not install. Symptom:
Error reading from file .\Product1\00382879\I07F61BB.GMP

If I ignore, I get it again on a different directory.

What I did:
1) Windows 7 Home Premium that is 3 days old - I am trying to slowly replace an older Vista machine that is having some problems.
2) Installed BaseCamp
3) Installed MapSource 6.1.3
4) Renamed executable and copied patched version
5) Downloaded the 4 part UNLOCKED NA 2012.20 from links in the first post of this thread with no apparent problems
6) Downloaded the installation portion from a link in the first post
7) Tried extracting with WinRAR - but failed
8) Successfully extracted all 4 parts with WinZip (trial) to c:\maps\ by only selecting the .ZIP file
9) Successfully extracted the 2 installer files to C:\maps\City Navigator North America NT 2012.20.gmap\
10) Run the installer

Note that on the older computer I successfully installed and used the 2012.10 North America - but I used LOCKED files. And Fast Image Unlocker.

Q1) Did I do something obviously wrong?
Q2) Is it worth trying with the LOCKED files and unlock them post installation?