nope you have root
JPH after flash and then use the latest
ryanza lagfix
or you can use some of the moded roms from the expert guys in XDA some of them already rooted and themed
this is the best place for SGS infos
http://forum.xda-developers.com/forumdisplay.php?f=665
read very good giudes in XDA before any flash to Froyo, JPC and JPH can change your product code to KOR (korea), so you need to backup nv-data first.
Bookmarks