Is the REG_DWORD in your registry?I can't imagine it does much, but I don't have sims 1.0 installed so I can't test.
SafeDisc, it got disabled because there's security flaws with the Dynamic-link library file and it wasn't updated since 2007.Uhm I could install the game for you but since Microsoft had disabled the *insert name, it was something with CD or so* i'm afraid I can't open it, but I can gi've it A try if you want?