When im playing saints row 2 im driving a vehical or walking and the road will be cut off, like five feet under it will show a horrible graphic road, it wont show my person in the vehicel and i cant get out of it or drive it, i cant move or anything i checked it and theres little scatches not major i clean my disc too. but anyways it will freeze but i still see cars going by and the weather changing and people walking PLEASE HELP ME!

Try restart your game it have happend alot with Saints row series that it can sometime bug out and not show any missons or it crashs.

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Try cleaning the laser lens with this:
http://www.gamestop.com/xbox-360/accessories/xbox-360-cleandr-laser-lens-cleaner/93068

hi, happens on my msi, notebook too. if you have 2 graphics cards and one is nvdia. disable the nvdia card in device manager. there has been problems with this card causing shut downs.

erm this might be a firmware issue i suggest if your still under warrenty contact xbl customer support and they will reflash the firmware on the cd drive

well its not applicable to all games ....you better upgrade you graphic card....the game will work fine

try and save the game to your Xbox360 harddrive(HDD) and then run it off that?

i have no clue im a big fan of saints row i can tell you any ather thing about the game

Well the disc driver obviously works on most of your games except saints row 2. Saints row 2 is in mint condition well i have this problem too with my 360 it reads some games and it doesn't read my other ones well theirs a few ways one is by leaving the game inside of the console and shut it down wait like 5 seconds and turn it back on.
Another is to make sure the laser its self doesn't have dust on it.
And when you put in a disc listen to it as it spins if makes any weird scratching noise its probably the laser hitting the disc a lot of 360s disc have been getting scratched recently due to the fact in microsoft's original design of the disc drive the laser keeps on hitting the disc and scratching it so if thats the case you have to replace the disc drive.
If solutions don't help let me know i might be able to help you more.

Read this thread:
http://forums.steampowered.com/forums/showthread.php?t=854399

It laggs because the developers are idiots. They could not properly convert the game from Xbox to PC and they're not planning on fixing it.