SimStreetsX is a standalone and does not require an installation. It patches and original game while maintaining a backup copy. Supported versions of the game are listed below, if your version is not supported please contact me on Discord.
To view the validity of the code signing certificate:
Right-Click SSXLauncher.exe -> Properties -> Digital Signatures -> Details -> View Certificate
The certificate is important because SimStreetsX may be detected as a false-positive by your antivirus software or Microsoft SmartScreen.
Also remember that SimStreetsX is open source on GitHub, feel free to clone and build!
SimStreetsX Version 1 - 26 September 2019 (340 KB)
Below are the original copies of the game executables which are supported; these are not patched/modified until you run SimStreetsX. As of now, it seems that there was only one version of the game ever released. This is despite the "Blue CD (1997)" versions, the "Gold CD (1998, Classics)" version, etc. It seems the only difference between these is not the games themselves but the installer. I have a "Black CD" (2000) on order, but I suspect it will be the same game as well. If you happen to have a copy of the game that's not supported, I'd be very grateful to have it.
CD Serial: All
File Version: 1.0.0
Release Date: 21 October 1997
MD5 Hash: df473d94fb4d6741628d58c251224c02
Download (1091KB): Download Link