For your problem building camo nets, I had the same issue. What you need to do is open your createvehicle.txt and find
Add the filters so it looks like thisCode:5 "B_"
Code:5 "B_" !"Land_CamoNetB_EAST" !"Land_CamoNetB_NATO"
Now you should be fine, so long as you added the other building things to createvehicle.txt already?
i have those camo nets in this filter: 1 "Land_" !="Land_Fire_DZ" !="Land_fort_bagfence_long" !="Land_BagFenceRound" !="Land_fortified_nest_big" !="Land_Fort_Watchtower" !="Land_fort_rampart_EP1" !="Land_HBarrier_large" !="Land_fortified_nest_small" !="Land_Misc_Cargo2E" !="Land_pumpa" !="Land_CncBlock" !="Land_prebehlavka" !="Land_tent_east" !="Land_CamoNetB_EAST" !="Land_CamoNetB_NATO" !="Land_CamoNetVar_EAST" !="Land_CamoNetVar_NATO" !="Land_CamoNet_EAST" !="Land_CamoNet_NATO"