Here is the link to the post where you can get it from.
http://www.subsim.com/radioroom/showthread.php?t=149596
I think it should be compatible whit RFB but i dont have that mod my self so iam not sure.
That Enviroment mod comes whit 1 main file/folder and 4 optional folder.
You can install the main part whit out any risk.
Just put the main folder ( Copy and past) in your MODS folder and enable it whit JSGME.
Its also safe to install that ship reflection optional mod if you want to.
You also might want to try out the Lite fog to fix a lttle fog issue in that enviroment mod. You can find that in the download section.
Vikinger.