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In case you're wondering why the cheats you've looked up on whatever website aren't working, it's because they don't specify that you have to press the keys in the right order. For example, in Haunted Mansion, press the letter of your desired cheat and then press F12 (holding the letter at the same time), and for Risky Rescue and Dave Goes Nutz, press the letter and then Caps Lock (again, making sure you hold the letter key down at the same time).
Pressing CapsLock first seems to be working in 3 & 4.

I need help in finding cheats (GodMode and level selct) for the first 1990 game.