I figured it out thank for everyones help.
this is what i did to install win 8 on mbp model that does not support win 8. please note that this procedure can work installing lesser os but you must make sure the bootcamp driver is of the same or around the date your computer model was made.
you will need a win 7 cd
the os cd of what you want to install
the bootcam driver .exe file that is no more then 1 year old of your model the better you can perform an update when your done. can be found in apple site.
durring install insert win 7 after restart press the eject cd button and switch cd of the os you want. if you didn't make it in time just press power button for 5 sec for shutdown and the cd will load next time.
then for win 8 click custom. delete bootcamp partition you allocated then reclick the drive then click next.
follow the install step and you finished installing the os.
then with an external drive have your bootcamp driver for your mac then do an update. then your done.
you can choose your os by clicking the icon and click start on mac os or durring boot hold option and then choose the drive you want to boot. hope this helps i tried making it simple and striait to the point.