Re: Pin Swapping
He is using Allegro and it must be urgent, because it's been posted on at least 2 other boards - in order to swap gates in Allegro the schematic must be setup properly, I don't believe it can be done in the PCB tool itself - reading the Orcad documentation should shed some light on this - but I have a feeling you'll not be happy, if you want to gate swap you must be dealing with identical devices in the chips, IE: 4 2 input nand gates or 6 ic's all containing 4 2 input nand gates, I don't know of any BGA device that would fit this scenario.
Hope I helped.
SiGiNT