Good to know ZTerm works!
Since the conversion didn't work, just hang on to the BLU images until I fix the bugs, might take a while, but you've done the hard work already. I'll try to image some of my own ProFiles and see what's needed to fix that tool. The last effort I made on that was related to Widgets, which almost worked, but not quite. Likely they both suffer the same issue, though BLU Widget images are slightly different.
In terms of LisaEm, yes, you'd need both the boot ROM as well as the dual parallel card ROM for them to show up in the boot menu as a dual parallel card as a bootable option.
But once you boot into LOS, LisaEm will lie to the running OS and tell it there's a card in that slot. But you may need to open the LOS Control Panel or Preferences or whatever it's called to tell LOS that there's a card in that slot and it has a ProFile and not an ADMP or some other device - LOS isn't exactly "Plug and Play".
There's also some issues with LOS where if you move the drive from one port to another it won't boot and it will return some error like 10727 or like it, so try to keep track of which port each ProFile was used on. I don't believe other OS's have that issue, but then again, right now LisaEm only runs LOS. You'd also want to make sure you set up the preferences to match the type of Lisa you have - i.e. I/O ROM 88 vs A8 and same card slot and upper/lower port. I've seen this issue when moving a LisaEm profile.dc42 image from the parallel port to one of the card ports and on actual Lisas.