I have now fixed it... heres what you do
1. backup your save games either to a USB dongle or PSN+ online storage
2. go to system settings and format the PS3.... just do the quick format
3. go to ps store and re-download the RAGE files
4. start up the game and download the update
5. ENJOY THE GAME! NO lag, NO long loading times and most of all: NO more texture stream problems WHAT SO EVER!
Play the game as it was meant to be played
Your welcome
