NVXxxx.bgl
APXxxx.bgl
OBXxxx.bgl
Should this help me?

Can I use multiple exclude in the same layer? For example a few exclude for layers lower than 120 in Scenery.cfg :
[Area.120]
Title=1107 Base
Local=Scenery\1107
Layer=120
Active=TRUE
Required=FALSE
exclude=N45 34,W120,N45,W119 34,all
exclude=N45 33,W120,N45,W119 33,all
exclude=N45 31,W120,N45,W119 31,all
exclude=N45 32,W120,N45,W119 32,all