Moin moin =(
Bad this map is protected, so at all you can't solve the problem, because you have to hack it for deprotection.
Thing is, does it lag from beginning or when you played for some minutes or what ever? But anyway I guess there are tons of leaks or maybe some corrupted stuff, which doesn't work correctly. Or the creator just used a wrong editor or something .. as long we can't open it, we can guess what we want
Edit: After taking a look into the map, just the trigger file of the map, I see hundreds of leaks, also he use mass gui triggers, which are a lot of bj's and if leaks and gui are fixed, this map could be wonderful
Greetings and Peace
Dr. Boom