Yes there is, I don't know if you are familiar with the concept of NMP. But its making "new" maps permanent maps in its own version of halo, this meaning you have customized maps without editing cache. You can do this by saving map as compressed in SparkEdit V3.02.
The "Halo Modification Kit" (HMK) may become useful to you because it has many things that can help you out with originally editing and then saving it correctly.
Here is basically what you are going to do:
1)Clear all of the cache in X,Y and Z
2)Load up a game of BloodGulch
3)Return to your dashboard (evox possibly)
4)FTP the cache file cache003.map from X Y or Z to your PC
5)Make w/e changes you would like, adding a patch etc.
6)Open the cache file in SparkEdit V3.0.2
7)File>>>Save Map as Compressed
8)Replace the map by using the name of a map that already exists and overwriting the old one with your file. (You can use any name that already exists in the maps folder that is multiplayer, but if do not choose a mulitplayer map or do not choose a map to replace at all this will not work
9)Have fun
