[78F350]

If you are familiar with Galletto you can modify and remap the DME on a bench. I've done very basic work with Audi and VW ECUs using Nefmoto, but have not messed with Porsche yet.

fooksm outlined the basics for DME 7.2:
https://986forum.com/forums/performance-technical-chat/31377-me7-2-boot-mode.html
https://986forum.com/forums/performance-technical-chat/32682-read-write-me2-7-ecu-whilst-still-car.html

I'm not aware of any of the frequent users here using a stand alone ECU with a stock engine, but there is this: https://grassrootsmotorsports.com/forum/build-projects-and-project-cars/forget-tt5-lets-go-off-the-deep-end-twin-turbo-v8-widebody-boxster/193174/page11/