SPRRFan, in your case I had those KUIDs so I checked the config.txt file and they came up as RRMods. Other than that, I have had about nine years of practice and pack-rat type accumulation (both my T:ANE and my TRS19 are 1TB each), but it comes down to Google a lot of the time. If they don't Google, then I post them here and hope for the best. Sadly, some very good sites, like Trainz Pro Routes (TPR) have gone away and are no longer available, so we live with what we can get. A lot of Google searches turn up earlier requests here on the forums, and sometimes there will be links, but it is hit or miss, whether anyone had responded before or whether the links are still good. But searching via Google finds way more hits on the forums than trying to use the Forum search. I have found the forum searches to do nothing but return a whole bunch of threads Which may or may not even be relevant, but it gives no clue as to WHERE in those threads the search keyword might be, so it is a manual slog to find anything anyway. Sometimes I get lucky posting here and Mr. Frank_Dean has an idea. He has more assets over a longer time period and more Trainz versions than I have.