I think the STCC cars were added to the readme in the last patch, of course it might not be what your after but just in case.
They've already appeared in mine
Code:
[Alfa Romeo 156 STCC]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[Audi A4]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[BMS Incognito]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[BMW 320i E46 STCC]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[BMW 320si E90 STCC]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
wheelcolor=
[Chevrolet Lacetti STCC]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[Honda Accord R STCC]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[Peugeot 308]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[SEAT Leon STCC]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[Volvo C30]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=
[Volvo S60]
body=
windows=
interiorwindow=
numberplate=
driver=
ext_driver=
helmet=