I've been mucking around trying to build a new interior cell for a mod that I'm making. Since this is not a dungeon I'd figured I'll use some of the floor and wall tiles that are used in the Solitude kit, for example in the ThalmorEmbassy01 cell. Problem is I've had a lot of trouble identifying the 'flow' of this kit (SM*{Flo/Wall/Dor}*Sol): which doors match which walls and floors, how to I fit in arches to make the ceiling work etc.

• Does anyone have a reference or some quick cheat sheet (e.g. some OPAL's maybe) on how to quickly work with other kits than the Nordic dungeon one that everyone is using as an examples in the video tutorials I've seen so far?
  
• After some time I simply copied the layout of the Thalmor Embassy but I get weird flickering where the floor tiles touch each other.. they could be overlapping, any way to check that or to get rid of the flickering without using rugs placed over the floor seams?
  
• Does anyone know if certain tiles can be grouped together so that they get selected and moved at once until ungrouped?

Click the red circle on a checkered ground button to activate the snap-to grid function. This will link the tiles seamlessly, at least when you also activate the next button (snap to angle) and only work in 90° angles.

As for working with the tiles, it's somethng you need to work with to get used to. use the preview window to see the tiles before placing them in the render window, and have a look at how they were used in vanilla areas. Best set "bAllowMultipleEditors" in SkeyrimEditor.ini to 1 and open a second CK where you can rifle trough the exiting areas, move objects etc, without adding those changes to your mod.

You can group-select using the "rubberband" mouse-selection, or by holding CTRL and selecting several objects, or a combination of both. Permanent grouping (i.e. until ungrouped) was possible in the fallout editors, but no longer in the CK.