Here are some custom maps I have made for Halo custom edition.
This is my first Halo map I have made. It is a small MP map. Made it back in 2010 or 2011 I think. How to use, place the spiral.map file in your, halo custom edition/maps folder and that's it, just play Halo CE (custom edition) and the map will be in your list. However any one that is going to play with you in MP will also need the map.