Upgrading HD--Minimal Backup Possible?

I'm looking at a 320gb 5200rpm HD for an upgrade, inexpensive at $70 w/shipping, and I need it because game data has eliminated the space from my 40gb. Fallout 3 took 5gb and GTA4 took 4gb, for example. I have 12 games and now 2gb left... so I won't be able to play KZ2 and all the other awesome games left to buy, and there's a lot of them.

So, does anyone know, if you don't need to backup music or video files, can you just backup the save data and survive the upgrade? I know that trophies are saved on the PSN network with the "sync to server" command. There were only a few files I couldn't copy, like Valkyria Chronicles game settings, but the saved games copied and I don't think I need to save the settings.

Here's to 2009, the year of the PS3!

Ok, You need an External HDD to backup your Game saves/Data

1. Go to the Backup Utility in System Settings under the Settings Tab

2. Backup to external HDD

3. Turn of PS3 and Replace HDD

4 Turn on PS3 and go back to the Backup utility and click "Restore Data"

5. Let it restore

6. Restart system (Just turn it off and on again)

THats it

That is the article I read!

I think I have enough information to swap hard drives... I just wanted to know if anyone has actually upgraded their HD having only backed up the save games.