IPCC Help Urgent!

Guys please help me,

I am giving my IPCC Group 1 in May 2010. There are 4 subjects. I want to know that if i pass in any 1 or 2 subjects but not able to clear whole Group 1, will i have to give those subjects(in which i passed) again when i reappear for Group 1? Or is it possible to get exemption in those 2 subjects and only appear for those subjects that i did not pass?

Urgently reply pls

thanks