Go get:
Revolutionary - zergRush local root 2.2/2.3 [22-10: Samsung/SE update] - xda-developers
then install it, then:
adb push su /system/bin
adb push su /system/xbin
adb shell
chmod 4755 /system/bin/su
chmod 4755 /system/xbin/su
exit
adb install Superuser.apk