Below are some frequently asked questions with answers for each one. If you're still stuck then feel free to open a support ticket.
Q. How do I add this to my server?
A. First you need to configure the loading screen. There are some detailed instructions on the instructions page.
If you need help setting your sv_loadingurl then this wiki article may help:
http://wiki.garrysmod.com/page/Loading_URL
Q. How do I add Music?
A. This is answered on the instructions page.
Please note that using Copyrighted Songs is illegal as you will be hosting and redistributing
the song to everyone who connects to your server. You will be held fully liable for
any damages caused to the Copyright Holder.
Q. There are too many backgrounds D:
A. Don't worry, background are dynamically handled based on whatever is in the backgrounds folder, simply add as many or as little backgrounds as you want.
Q. Help I Can't add extra backgrounds D:
A. Adding extra backgrounds is fairly easy, just add another image into your backgrounds folder.