Quote Originally Posted by BIGMamaSloth View Post
4. Are 1st and second edition very dramatically different? like 3rd and 4th were?
One thing to note about older editions (pre 3e) is that they are very downward compatible. You can pick up a Basic module, like the classic Keep on the Borderlands, and use it for a AD&D 2e Players Option group with very little need of conversion.