I'm having troubles with a fresh install, some traces leading to mod bugs, which i'll list here.

TC-70/Simca Rallye gr2/140hoy/140hoy_SIMCA_RALLYE2.CAR
Sounds=SIMCA_RALLYE2_SOUNDS.aud
should be
Sounds=SIMCA_RALLYE2_SOUNDS_1150.aud

Volvo P1800 #23 Del Monte car gets installed in \GameData\Teams\GTC-65_MODs\Volvo P1800\23\ folder by the autoupdater.

Since ther's no such dir inside mod archive files i'm not 100% sure why this is happening and may only suggest a racing condition, when the parent car mod not yet installed, borks autoupdater folder creating logic.

Also, this is repeatable and 100% replicated in few fresh installs.

On a side note: mod readme file should probably use #23 not #36, as everyhing even the readme filename suggest it.
>"Volvo P1800 #36 Del Monte (fantasy, or at least the man at Del Monte says it is!!)"

*.car file present in the AltbierbudeClasses10.6.zip but corresponding mod does not download.

Code:

\GameData\Teams\TC-65\Lotus Cortina\511\511_SIM_TC_CORTINA.CAR \GameData\Teams\TC-65\Ford Escort 1300GT\77or\77or_SIM_ESCORT_1300.CAR

moreso, 77or_SIM_ESCORT_1300.CAR uses "HDVehicle=ESCORT_GT1300.hdc" while all other cars use "HDVehicle=ESCORT_1300GT.hdc"