Ok this is more like a walkthrough as i will be just showing you how to replace a modified GPD with your normal one this only includes the salvage which is maxed out to 2,000,000,000
Ok so download the modified GPD
http://www.megaupload.com/?d=HNQDIXFU
Things needed are horizon or any other tool to browse you profile
Now open up your profile into horizon and look for the GPD called 5451085F.gpd
Now right click it and hit the replace button
Then look for your modified GPD which you downloaded and select it then simply click the rehash and resign button pop it back into your HDD or memory stick and enjoy your massive amounts of salvage
EDIT forgot to mention that the salvage goes to 999,999 after a purchase which is sad but still enough