Do Not Try This...just For Discussion!!!
not sure if the files would break if you tar them. the originals have unknown owner/group...while expanded tar archive shows current logged in user/group own them. i'm guessing these permissions don't matter within windows...dunno.
check permissions on the two original files
# ls -lFa /Volumes/Untitled/WINDOWS/system32/ | grep "wpa."
-rwxr-xr-x 1 unknown unknown 12K Dec 2 22:45 wpa.bak*
-rwxr-xr-x 1 unknown unknown 12K Dec 5 23:11 wpa.dbl*
now archive the two files to your desktop...watch carriage return...should be one line
sudo tar -cvf ~/Desktop/preserve_activation.tar /Volumes/Untitled/WINDOWS/system32/wpa.bak /Volumes/Untitled/WINDOWS/system32/wpa.dbl
open archive and check permissions on unarchived files
# tar -xf ~/Desktop/preserve_activation.tar
# ls -lFa ~/Desktop/Volume/Untitled/WINDOWS/system32/ | grep "wpa."
-rwxr-xr-x 1 montalvd montalvd 12K Dec 2 22:45 wpa.bak*
-rwxr-xr-x 1 montalvd montalvd 12K Dec 5 23:11 wpa.dbl*
...if permissions aren't an issue, maybe parallels can give us a script (or built in function) that archives the activation files and on demand extracts files allowing to overwrite broken activation files? i'm sure there's some concern over piracy issues (not so much whether we're pirating...but rather that we're breaking anti-piracy on a product...even though this can only work on the same exact machine).
could look something like this...PLEASE DO NOT TRY THIS!!!...THIS IS ONLY FOR DISCUSSION!!!!
# tar -xf ~/Desktop/preserve_activation.tar /Volume/Untitled/WINDOWS/system32/
don