printing an index at the begining of the report

hi, i need to create an index at the begining of the report which lists the number of the pages where groups are printed in the report.

I can create an array to keep the number of page when a grup is printed but i don't know how to print this array at the begining of the report

Actually i could use javaBean connectivity to return a resultset at the begining of which is this index, but maybe there is a more direct and simple way to do it, using crystalReports only. is it so?

thank you a lot in advance