i need to create bookmarks
so i know where to read
so i know where to read
This isn't really necessary if you write a half decent parser. For example, this could search through the file for a line that starts with "level = ", followed by the number of the level you want to read in. Then, from that point in the file, you read in all the other settings, like "resources = 20", or whatever.
However, for your situation, I think it would probably be best to simply read sequentially through the file at the start of the game and put all the values into an array of types.