As the original author of this software, I want to add a few of my own comments to this thread.
#1 I would personally prefer if users don't need to rename rom files to get them to work in
VPM - this can be done a number of different ways.
No disagreement from here on that. The way we install today is totally a hack. But the fact that the software changes so frequently, makes it unfeasible to add a correct SHA1 checksummed driver entry. However, even today, PinMAME complains about bad CRC, so that really isn't the issue. It would be enough just to add a generic entry for "TZ - FreeWPC version", whatever version that might be. That would at least allow people to experiment with it without any danger of overwriting their real ROM files. I have no strong opinion on whether a change like this is made, but that's how I'd do it.
The FreeWPC build process creates new filenames like ftz_0_06.rom, beginning with "f" to denote the FreeWPC version. I rename them just for testing, but I always publish them with the new names to avoid confusion.
#2 If I was to add this romset into
VPM, I would want some assurance that the romset being added does something unique - has some redeeming value.
Also agreed. The fact that anyone CAN create a new version of Popeye does not mean that anyone cares

I've gotten by for 5 years without any special support from you guys, anything more is gravy. Without pinmame this project never would have worked; the first few years of testing were all done in emulation. So thanks!
#3 I would also want the romset itself to not damage a real machine, should some owner put the code on a chip and put it into their machine.
What does that have to do with pinmame though? You're not distributing the ROMs; we are. I do understand that up until now, people are used to playing only official ROMs, and so that expectation is there of being solid and mature. And if you believe that including a FreeWPC ROM driver tacitly "endorses" the project, and you choose not to do that, then I understand. But I'm not sure if that's your concern or not.
Oh, and regarding the "burn your game up" disclaimer, that's always been my approach to the matter. Until you've worked with software like this, you have no idea how ridiculously easy it is to mess things up. Luckily I did that in an emulator before ever putting it into a real game. If people stick to one of the "tested" ROMs, they shouldn't be paranoid about it. But I'm obligated to let people know what their warranty is. It's really no different than the standard GPL "use at your own risk", just a tad bit stronger...
Thanks!
Brian