How do I open RXDATA files?

[Inklops]

I own RPG Maker XP on Steam, and I was wondering if there's a way to open RXDATA files. Honestly, I'm not even 100% sure I really need to get into these files, but if possible I want to be able to open them and see what's going on in there. I've tried opening them with RPG Maker XP, but it always gives me the error message "unexpected file format" and then closes. Is there a way to open these files?

[Gastronely]

That's because you can't. In order to actually edit the game, you first need to create a project file. Enter the directory that contains the Game.exe file, create a text document, type "RPGXP 1.05", and save it as Game.rxproj. Afterwards, you can open it with rpgmaker xp.

[Walter Teigan]

Where is that file?