We used IPA and messed with the rqc config xml. The "Priority" in RQC was changed to say "Special Shipping" with a drop down. The selections are given different priority numbers and have corresponding comment codes. So if they select Overnight - 8:30am it changes the req priority to 1 and puts in a PO Header Comment that says "Priority First Overnight" etc.
The PO100s are set that the 1-10 priority reqs batch out as unreleased so the buyers can call in/email the rep/etc.