Nexus Mods : Another reliable alternative for manual installations.
If you love a mod, consider buying Half-Life 2 on Steam (it frequently costs less than a coffee during sales). Once owned, you can copy your repack’s save files into the Steam version. However, for archival and offline gaming preservation, the knowledge above keeps these mods alive.
Creating a non-Steam re-pack requires a good understanding of the game's engine, modding tools, and file management. Here's a basic outline of the steps involved: