Pablo,
Thanks for your comments. I have compared my DBW bldconf.ini with the code you provided and found that my game is configured for mission building/game play, and for not creating maps.
Regarding my statement, "At first, I thought the feature I've described above was just not yet incorporated in the version of FMB Plus that's included with DBW.", this could be a misunderstanding about DBW on my part. I am under the impression that some mods must be revised in some way in order for them to work in DBW. So, what I meant was that I didn't think such revision had been done on the FMB Plus Mod.
Before DBW, FMB Plus was a JSGME mod that had to be activated by the game user. Now, it appears to me that FMB Plus has been written into DBW. I looked back at the files for DBW 1.1 to 1.6 and could not find a FMB Plus Mod file in any of the JSGME directories. Yet in my DBW Build 1.6 install, I can move, rotate and copy groups of objects. It is my understanding that if you have these features then you know you have the FMB Plus Mod. I am a mod user, not a modder. My knowledge of mods is limited. So, if I've misunderstood anything here, let me know.
I don't use MissionProCombo, but before responding to your e-mail, I did try it. When activated, MissionProCombo does not give me access to the road plates either.
So, my question now is, can anyone using a mission building/game play DBW version of the game insert road plates into the missions they build in FMB (e.g. roads, railroad tracks, runway sections, etc.)?
Cheers,
Riptide