How to have different headers/footers inside SSRS report

I am doing a SSRS report to generate some kind of print outs. I am using SSRS 2008.

I need to have different footers inside the whole print out.

e.g. After first several pages I need to use page number as page footer( this can be easily done). but after that i need have footers as Annex A -1, Annex A-2, or Annex B -1 , Annex C - 1, when the page is Annex A, Annex B...etc.

Anyone can help me with this?

Thanks.