Its not that bad. Maybe ill write a few notes about all of this because its useful to know esp if your setting up a VTT where you have to serve as a DM. Its more VTT related than anything specific to mapping but it comes up time and time again so maybe. The rewrite engine is slightly more complicated but you dont need to know about that unless you are running Apache or have web pages served from an ISP which uses it. And even then you don't have to use it.