Episode 2 opened up fine for me. I haven't had a chance to really look through it, but it does seem that there are significantly less lines with no description or alternate filenames. I think the program assumes you've installed the game under c:\Program Files
I'm glad they didn't use any of those DeLorean explanations.
1955 from behind the billboard(Part1): The DeLorean had no Mr Fusion or hover conversion, and constantly filling up with plutonium throughout the game would be a pain.
1955 from behind the billboard (Part2): Okay, this could have been possible, however you still have to consider that at that point the time circuits were glitchy and it would be difficult for Doc to try and return it in it's original glitchy condition.
1885-1955 in the mine: The DeLorean was damaged and not working. It would be ridiculous for Doc to repair it, use it, then return it in it's original damaged/non-working condition.