TNEW web promo on a roll-over renewal order?

Hello all.  We are on TNEW for our ticketing purchase path.  Our roll-over utilizes a source code and price type mapping, therefore rolled orders have the source and price type populated.  Is there a way with TNEW to set up a web promo for use on a roll-over renewal order where source and price type are overwritten or changed?

Thanks,

Heather