Still not working, I have done exactly as you said, and the only balloon I see it is the one with the original track, no ballon above or bellow the track, absolute void...
I use the track link in my description, the one provide by THR, here the models.ini I edit:
[MODEL_0]
FILE=walls.kn5
POSITION=0,0,0
ROTATION=0,0,0
[MODEL_1]
FILE=nordschleife1965.kn5
POSITION=0,0,0
ROTATION=0,0,0
[MODEL_2]
FILE=nordschleife1965road.kn5
POSITION=0,0,0
ROTATION=0,0,0
[DYNAMIC_OBJECT_1]
PROBABILITY=100
MULT=1,1
FILE=fujiblimp.kn5
POS_MODE=RANDOM
RND_POS_CENTER=-2105,-1175,-2875
RND_POS_RANGE=3100,50,3100
VEL_MODE=RANDOM
RND_VEL_BASE=0.2,0.2,0.2
RND_VEL_RANGE=0.1,0,0.1
[DYNAMIC_OBJECT_2]
PROBABILITY=100
MULT=1,1
FILE=bal_mt1.kn5
POS_MODE=RANDOM
RND_POS_CENTER=150,715,-900
RND_POS_RANGE=75,10,75
VEL_MODE=RANDOM
RND_VEL_BASE=0.2,0.2,0.2
RND_VEL_RANGE=0.1,0.1,0.1
[DYNAMIC_OBJECT_3]
PROBABILITY=100
MULT=1,1
FILE=bal_mt2.kn5
POS_MODE=RANDOM
RND_POS_CENTER=300,705,-700
RND_POS_RANGE=40,20,40
VEL_MODE=RANDOM
RND_VEL_BASE=0.2,0.2,0.2
RND_VEL_RANGE=0.1,0.1,0.1
etc...
The balloons are in the nordscheilfe1965's folder, they are rename in bal_mt1.kn5, bal_mt2.kn5 etc...
The only one that appears is the fujiblimp.kn5 provide with the track...