Reload single lua

Using lua_reloadents or restarting map takes lots of memory, it lasts forever and it reloads addons that I don’t want to be loaded.

So how do I reload only a single lua file in my addon?

with http://www.garrysmod.org/downloads/?a=view&id=78811

-snip-

lua_openscript
lua_openscript_cl
and the mod the guy linked above
gamemode_reload

Some helpful commands.