i am suggesting u that if u r able to use the software called BOOT MAGIC then this s/w helps u to bring all the operating systems which u have in ur MBR so that u can boot any of them.......

try using this s/w. it gives u the option of booting all the o.s. which u have installed. i am sure u will get through, the s/w which i told u to use i.e. boot magic runs only on windows versions so u will have to adjust urself accordingly