I recently started up a new play through of New Vegas and completely forgot that using commands disables achievements. I have some that should've been unlocked many levels ago and would just be a pain to go back and get because of everything I'd have to redo. I'm not sure if there's already a mod that let's you pick separate achievements but I know there's quite a few that lets you get them all at once. I know there's a few people who actually like getting the achievements on their own rather than all at once, so I guess this mod would be for the people who have trouble getting certain achievements, just want certain ones rather than all, or just plain and simply f*#@ed up like I did.