I here, after searching a lot over the net and failed, would be providing some High Resolution wallpapers for your Galaxy S. There aren't much sources available over the net.
These wallpapers I'm providing are perfectly matched for your phone's resolution. You may also email me a certain High Res pic which I definitely will provide a wallpaper for.
Please keep your Screen 1 blank, coz all the wallpapers have been designed so to occupy the gist of the image on screen 1. You may use screen 2 and onwards for your own purpose (widgets, shortcuts, etc.)
Minimum number of screens to be used is 2! Thanks!
NOTE: While applying wallpaper, please maximize the orange window to occupy the entire picture. :)
Oh and btw, please click on the image, enlarge it and save it to your PC and then transfer to your phone. Once the phone finds that file, go into gallery>Open the wallpaper>More>set as>wallapaper>maximize the orange window. And you're done :)