I have not tried your link, but my game was suffering all the classic problems, leaving it unplayable.
Windows 7 has recently updated and lag problems are history in all games.
And this link: http://xbox360video.net/how-to-bug-the-xbox-360/saints-row-2-fix-fast-forward-bug-for-windows-7
has a video guide that fixes THE FAST FORWARD speed problem that uses a program called CHEAT ENGINE that runs as a seperate process, without altering game files and gives you full control of the game speed. And can also be used for all your games.
SAINTS ROW 2 IS NOW VERY PLAYABLE.
But you know, I payed £35 for this game over a year ago and can only now play it after months of system changing, emails, phonecalls. No wonder young people don't pay for games nowadays, it's a con.
I have W7 professional 64 bit, and I do suffer from this speed issue, actually just thought the game was simply ported to the PC without a care, glad to see that it's a real issue and not just bad programming.
Anyway, I own the game on Steam, so I'll try the fix listed in the first post (many thanks for that, by the way), and see if it works.
Now playing : MAG, and promising to shotgun enemies and perform medic duties to the best of my abilities, to boot!