Originally Posted by Jake
Once you've found the Nutrispecs on any playthrough, you get it at the start forever.
(The only way to get the achievement is to play through those early parts w/the specs, as there are scannable things in there, I believe!)
I'm pretty sure the only spec related trophy involves the NutriSpecs, Future Vision and Pudding Head Lincoln.
Edit: And if you want to see the 'getting the nutrispecs scene' again, just delete all the related files except the actual game).