Mondkalb informed us he released his MBG Killhouses and MBG Cindercity addons on the BI forums.
MBG Cindercity adds a new island full of custom-made walkable structures:

• 4px per 1m² Satmap resolution
  
• 4m terrain cell size
  
• 2km² size
  
• 8 digit grid
  
• FTHUD ready
  
• Lifesize Copehill Down FIBUA village with authentic structures
  
• Mixed with BIS structures
  
• All buildings are enterable
  
• No dead-end backyards
  
• All BIS Modules (ALICE, Silvie, Warfare, etc) work
  
• All additional keypoints (FlatArea, FlatAreaCity, etc.) are available
  
• All civilian cars on this terrain will have british license plates registered to Brighton...
  
• Comes with built-in rainy shitweather.

MBG_Killhouses adds 7 new walkable buildings. These buildings are purpose-built to suit Arma 2. This means floors, doorways, rooms and the overall collision-model have been adjusted to cope well with the current collision-detection. Here is a quick overview of all the building's features:

• 5 killhouses
  
• 1 Shoothouse
  
• 1 Big Warehouse
  
• Fully functional in Editor and Visitor3/4
  
• Highly precise editor-icons for easy alignment
  
• Averaging 100 positions per building
  
• Several wall-segments (Straight parts, corners, doors, gates, 3m height an 0.8m height.
  
• MP-Synchronized door-/gatesounds
  
• Breachable doors and wall-segments