[RMXP] MAKING YOUR GAMES PLAYABLE WITHOUT THE RTP OR ENGINE INSTALLED

I sent a packaged copy of my RMXP game to someone who doesn't have the RMXP engine installed. I put the RGSS102E.dll file in the game as well as all of the folders and RTP resources I used in there, so everything was all included in there. Yet they are still getting an error that says: 'RGSS-RTP Standard not found' even when I had all of the RTP resources and the dll file included in my game. Why is this still happening? I have played RMXP games in the past that didn't require you to download the RTP or the engine itself. How do you do this?

Thank you!