Good news and bad news, fellas. The good news is that the Pony Cart can be found (and driven) in the Return to Steelport mission. All you have to do is leave Safeword the way you came once you hear the quip about hand sanitizer (once you get the second-to-last waypoint to Zimos) and head to the base of the tit-hill opposite Zimos (who spawns when you hit that one waypoint). If you're having trouble finding it, Zimos appears as a purple dot on the radar. The bad news is that no matter what I've tried, there's no way to use it outside of the mission. I tried putting it in my garage, and it would just stay there. I tried customizing it (thereby placing it in my garage) with gibbed's customization mod, but it stays a non-customizable vehicle. If I'm lucky, I might be forgetting a way to get it outside Return to Steelport. Anyway, I was wondering if there'd be any possible mod that would either place it in one's garage or maybe make it spawn outside Safeword once you're done the mission (or the Stronghold). Maybe it's possible to include parameters for it in the vehicle customization mod. Let me know if anything's possible.