Changing some lua in Parasite gamemode?

My server runs the parasite gamemode and a lot of people like it, but after a certain amount of rounds the map switches to css maps that don’t work with the gamemode. Can anyone change some of the lua scripting so the maps don’t change, and just keep running the same map? Here’s the link to the gamemode.

If you know how to edit it just put the edited file in your post. I would greatly appreciate it.