Very nice. I like it a lot.

No, there isn't a dedicated mapping guide for SS2. SS2 primarily extends DD3 with more styles, and is used the exact same way as DD3 itself.

And as a dungeon style, yes, you would find it in the Dungeon category. Generally, the Floorplans one is for modern/sci-fi type stuff, to separate it from the more fantasy-style stuff in the Dungeons category, although both are floorplan-level maps.

Yes please.

There is a white rectangle outside the map on the SCREEN sheet. Hide this sheet and you can see what is outside. Draw on a sheet that is after this sheet in the sheet order to draw on top of it.

The primary use of this sheet is to hide things like symbols that partially extend beyond the map border.

The Humble Bundle setup is a very good starting point, giving you everything you really need.

But if you want to expand the styles you have available to you, Symbol Set 4 and 5 offers a very nice dungeon and city style. Symbol set 1 is also nice for additional overland styles.

And you can get tons of new styles through the annuals. I love the annuals for their diversity.

Sounds like unnecessary work if it is just the ca3.mnu file that is broken.

A repair install should resore missing files, so I would try just to delete the ca3.mnu file from your data directory, and then run a repair on character artist. That'll probably restore that file. If that works, you'll want to do a re-install of the latest update after that.

Didn't really notice the straightness of it until you pointed it out. It's fine as it is.

RCV20 is just a macro with a single line, RCVDATA, in it. RCVDATA is a variable holding data sent to CC3+ via intercom. I guess you can populate this variable manually and then call the macro, but it is really a special macro made to handle intercom requests that are CC3+ commands.

The available documentation is the .pdf that comes with the XP toolkit. It is old and incomplete, but that's what is.

As for using C# from an XP, that is actually possible. @saunderl did once write a tutorial about that, but the site is no longer available and the wayback machine don't seem to have captured the actual tutorials. I've been considering looking into that myself, when time permits, but it is fairly low down on my priority list.

Won't help you now that you got it working, but I should probably put this into a blog article for future users.

Well, there are a few less entities, so it would be marginally faster, but in practice, nothing you would notice.