First off, I hope my terminology is correct when I call an area a cell? Say I load up SuperDuperMart interior, that entire space is called a cell?

Anyhoo, I'm doing a few mods that clean up certain areas, my current work is The Capitol Building. If you look for the CB interiors in GECK you'll find 4 different
cells - two of which are actually (nearly) the same area (1) CapitolBuilding01 and (2) CapitolBuilding01b - looking at them in more detail there are sections that are duplicated in both cells, but for some reason the author has decided to split up the area into two cells. Can anyone give me a reason for this, perhaps memory/system strain for the end user? Something like that? Or perhaps he did it purely for his own ease of following the layout. If you check the first pic below you'll see that I've placed 01 and 01b in the same cell to show the duplicated areas. In picture two you'll see that I've done a rudimentary connection
between the two cells, now obviously in the one cell (which means I'll have to sort out door teleports later, from the outside world etc.

http://i49.tinypic.com/29ut308.jpg
http://i46.tinypic.com/nf5no2.jpg

So, to sum up...is anything wrong with this plan of action, tell me now before I continue please!

Yes you are correct. One entire interior area is called a cell. However, outside worldspaces are broken up into 1024x1024 unit squares each called a cell.

I would say that the author of those areas broke them up for performance. a cell can stretch up to +/- 32000 units in any direction before it breaks. (a limit caused by Havok) And I don't really see how those are almost the same, the only similarity is that one hallway at the bottom. I do not believe they are supposed to connect like that. If I were you, I would leave them separate from eachother, and not combine them into one cell. They are a good size as is, and combining could begin having detrimental effects on lower end machines.

Yeah, it looks like you're right. I've taken a timeout to scan through a number of other cells to get a decent idea of average size, my two-in-one Capitol cell is a monster is comparison to most. What I think I'll do is throw in some artistic licence, update a few areas but ultimately split the cell back into two.

Cheers for the reply! A great forum, a great game and a great construction app. Highly addictive stuff for a guy that never had any real interest in games before F3.