I am also interested, want to do it with the Ibrox of Rangers.
Server > Creation Master
1. Decide the ID that you gonna use to install those Stadium (for example i use ID 0) and you need both of stadium version just for your example so you can easily understand this.
2. Rename this file
-model.rx3 > stadium_0.rx3
-texture_day.rx3 > stadium_0_1_textures.rx3
-texture_night.rx3 > stadium_0_3_textures.rx3
-crowd_day.dat > crowd_0_1.dat
-crowd_night.dat > crowd_0_3.dat
3.folder 1 and 3 is the glares files, you also can rename that files, just see the cm stadium glares files version, you fill find the similarity of the name, (is too lot to explain)
4. Then put the renamed files into a new folder (crowd, stadium, fx)
crowd : crowd_0_1.dat, crowd_0_3.dat
stadium : stadium_0.rx3, stadium_0_1_textures.rx3, stadium_0_3_textures.rx3
fx : all glares files (if you rename that)
5. Then install it, its all just about changing the files name