Walkthroughs for custom maps.

lord_vigor, "7 troubles, one solution": when playing single-player custom maps, it's necessary to make regular saves, and then delete older saves as you progress (I archive saves from the beginning of each week for later analysis and to remember things; the 7-zip archiver compresses them well in its own 7z format). There can be many different reasons why you might need a save from 1/2/3 weeks ago. If you don't have this habit, develop it; it saves a lot of time and nerves.