This is how I did it;
Copy both files for your GRR profile.
Mine are in here using XP Pro:
C:\Documents and Settings\PVB\Application Data\GridRunnerRev
Copy them to another folder, say within a GRR folder in My Documents.
Then uninstall your current version of GRR.
Install the latest (online scoring) version of the game.
Start it, change all video and sound settings to what you originally had.
Do not change/input any online settings.
Play one game. Get a score, you get warned it would only be an offline score.
Exit game to desktop.
Copy original profile files into the profile folder for GRR, replacing the existing files.
Start GRR again, go into settings and register for the online scoring.
Go back to the High Scores menu and your previous version highest scores should now be showing in the online tables.

