Hi, Shalon001!
Man, F1C is a very similar game to Rfactor and it's totally possible to convert anything you wanted: cars, track objects and tracks. See, I convert mostly tracks, but I've converted cars too, but only the fairings, because the physics of the F1C is a little different from that of the RF... This requires a lot of patience and is a different matter than what conversion really is.
The F1C files are the same as the RF files:
GDB
CAM
AIW
SCN – only this one deserves attention because it undergoesmodifications; in the others nothing changes.
F1C doesn't work with the TDF file, but you can take any other TDF from another track and name it with the name of your converted track, as this file is usually standard, barring exceptions.
The necessary tool: 3dsimed (preferably V2 or V3, as they are able to open the track through the SCN file) – In fact, 3dsimed is the fundamental program, because it is what makes the conversions of the meshes and also of the textures, but others are important for you to work some details you want: Zmodeler2 and a good program that works textures. A tip that is perhaps very, very important is the Format Factory! I explain: the 3dsimed has some difficulties in converting TGA textures to DDS, as well as some BMP to DDS and I pass all the textures, even those that are already BMP, to still BMP format in the Format Factory, as if it were a cleaning of these BMP, because several have been saying that they are BMP but are not considered by 3dsimed as BMP and this is a complicating factor in the conversion ... then, after I pass all the textures converted to BMP by FF is that I convert these textures in 3dsimed to the DDS format, then yes it is guaranteed in 100% that your texture conversion will be guaranteed.
Another tip: before compressing these GMT and DDS files, you can try to open the game with the objects all open, because the game accepts this very well and then you can see if your conversion worked or not and you can work anything that is still necessary to work before, as a result of successful conversion, in fact compress all files.
Well, I really like to convert clues and it's an almost professional hobby of mine, so if you need to ask questions, feel free to ask me anything, I can even follow up your first conversion with some instructions that are necessary, okay?!
Hugs