I have installed both the Brands and Oulton carsets over Gianfranco's latest "self-installing" carsets - no problem if I load Brands omitting Beltoise from the driver list, and no problems whatsoever with Oulton
You might find the problem with the matra by using 3dostrn.
For 3dostrn to work you need to unpack the dat file so all files are present.
- First make a copy of the current matra folder.
- unpack all files in the dat with doodat.
- then copy the files from the backup folder back in and let it overwrite.
- drop 3dostrn in the matra folder and let it run.
You should find a textfile strings.txt which lists all 3do files and the mips it uses.
Spot the missing files and see if you can nick them from another folder.
andashr.mip was missing. Copied from another carset and now all is well.
Many thanks to you for your help Mech, and to you pioujd428 for the great carset