Alright - I gave the DISM steps a shot and got an error when trying to analyze the image in BigFix. The rbagent.trc file does not seem to exist on my OSD server, nor on my local PC that I am running the console on/running DISM on:
When browsing for the installation media folder, I chose the folder that I extracted the ISO into originally. These are the files within:
…so to me, this looks correct. I guess I am not sure what BigFix is not liking about the uncompressed ISO folder. The folder I selected in BigFix was the parent folder of the items you see above.
I also tried uploading just the install.WIM, as Windows Format Image. This did successfully upload, but for some reason, the image tried to create like 10 partitions on the drive, 15gb each. It also took at least an hour for analysis, and eventually failed to image due to some sort of partition mismatch.
I feel like the former method is easier/more correct/streamlined, but I will take any suggestions.