I rewrote the dos track loader in assembly, used to be in c++. Without particular optimizations it runs 4x faster, is 8x smaller, and I put in some other improvements as well. Some documented and undocumented manifesto commands were removed, so depending on how long you've been making or collecting tracks for, you may need to keep the older version of the loader handy to play them, or otherwise modify their $ft files to be compatible. The loader along with the rest of rallysported remains in beta - any bugs you encounter are part and parcel while that's the case.
I introduced a new dos tool, rsed_cpu, for creating cpu opponents. It lets you save your in-game lap as the cpu's for others to race against. There are some quirks to using it and I don't yet understand 100% of how the game deals with these data, but all told it seems to work decent. I updated the linux tool rsed_ai, which you can still use to tweak the cpu's lap once you've recorded it, but the linux version of rallysported in general may become obsolete, as did the windows version before it. My interest is shifting toward assembly over c++, which means more interest in developing for dos. For how long is a different matter.
The new dos v.7 pre-release is up, link in the second post. The linux version remains as v.6, I just updated some of the files. The track loader in the linux file is the old version.
Using rsed_cpu, I added a proper cpu opponent to the herbmare track, and updated the file. Maybe you find the cpu easier than the lap record to break.