You can close trackmaker, and open up 3dsimed. There are 2 ways to get the textures. Open the ptf file in simed, and export the textures, but you will get all the mip files for it. Which is fine, then you only get the files that are needed. Then since you have do this part anyways, this is sometimes a little easier. Just depends if you dont have a ton of extra files in your folder or not. In simed, under tools, click texture browser. Go find your 2k3 track folder, and all the mips should show up. Click on batch conversion, highlight all the mip files, click open, dot tga, ok, then drop those files into the folder you droped the trkmaker files in. All converted right, a pop up Finished! will show. Congrats almost home.
Take a peek, click on the _trkmaker file, looks like a track now. Its 3do time. Double click your ptf file and open in 3dsimed. Track will take a min, but should load. You will now see all your 3dos in the track. Head up to file, save as rfactor, save objects. Point that to the new folder also. This will spit out all the 3dos as gmts and give you an output file.
Here is where it gets a little interesting. We have already converted all the textures, and the 3dos. Click on the output file, and you might have some files showing up as pink. Usually that means those files are in the shared folder. One idea if to create a new folder, and batch convert your entire shared folder to tgas. Export your track objects to the new folder. Open up the output file in simed. Now export your textures to your new rf track folder. Some will be pink, dont worry, when you open the output folder in simed, most in not all will show now.
Ok, I see everything, but where is the track? Open up the trkmaker file in notepad or wordpad. Edit, select all, copy, close. Now open output in note or wordpad, and paste that in the top. Close and open the output in simed. Now, it should look like your track. Congrats, you just converted a 2k3 track to RF.
3d Max and rFactor Tutorials