Changes from BPS to IP

Hello all!

My company is working in the upgrade from 3.5 to 7.0, and I am the responsable for the planning. My question is what do i have to change in the transaction BPS0 and in BW?

I know the syntax of formulas fox changed, for example now we have to use FOREACH IN REFDATA......but what else do I have to do?

thanks in advance!!!