Disabling Roma Surrectum environment?

[TW-fanboy]

Hi, is it possible to completely disable the new enironment? because i have a problem with it. I can start a battle normally, no lag, and then ca. every 5 minutes it starts to lag for a minute or two, no matter whats happening on the battlefield.It can start when the armies are marching towards each other, andf then, in the thick of battle, which would be understandable to cause lag, it disappears. Or the other way round. It's pretty random. I had this problem with several mods, and after returning to the original environment the problem was solved. Now I want to deactivate it within RS II aswell, as I like the mod.
Post Scriptum: Please excuse me, if you have problems understanding my problem, English isn't my mother tongue. Therefore I sometimes have problems articulating special things.

[Brusilov]

It would be very hard to unpick the RSII enironment from the mod.

Post your PC specs and the graphic options you've selected. Someone may be able to make a suggestion.