Upon further reflection (like 10 seconds worth) since there are only 2 files in the auction ZIP file that collide with the shipped ZEN versions, if you compare those 2 files line by line (or better - use a tool like WINDIFF to spot the changes), if the changes are ALL related to the auction code (which is in a block) then the auction code should drop on top OK. If not, you need to move the 1.3.8a auction related code into the same spot in the 1.3.7 code.

That is the best I can do to help... sorry...

AHB