I use drivername_trackcode, so when Amp88 sent me his FO8 set for KY GP Long, I gave it amp88_ky3. If it's a special set like a one-lap quali set or a spec set, it'd be called amp88_ky3QUAL or SPECamp88_ky3.
At first when I didn't know the track codes I'd use the whole title, but that got annoying especially with long track names (i.e. Chicane Route). Switching over helped me learn the track names better.