Jeff,
consider yourself fortunate that apparently your rigs show up because I tried three different methods of installing the files.
1) Inside my RTMM (Misty Moorings) folder as outlined previously.
2) Placing the munchbros folder and its sub-folder into the Scenery/World/scenery folder. (Nesting folders will normally work fine.
3) Finally putting all 29 .bgl files from the scenery folder into the Scenery/World/scenery folder, then placing all 58 .bmp files from the texture folder into the Scenery/World/texture folder, followed by placing the 4 effects files into the Effects folder of FSX.
Result. With all 3 methods the sim will not even start! SOOOO back to the drawing board and manually having to find and delete all 91 files out of FSX so the sim will work.
What I think is the problem is that the manual mentions a "Base Pack" that must have some other files in it that are required. According to the directions the munchbros folder is supposed to be added into the Scenery Library of FS9 which the base pack did, and the installer adds the files into that folder.
I did make a munchbros folder, placed the files into that folder and added it to my FSX Scenery Library and when I tried to compile the scenery database the sim CTD upon finishing the compiling. Something is very wrong I'm afraid.
In any case for a few FS9 oilrigs it just isn't worth it to me to expend any more effort on something I'll rarely see anyway except in passing as I fly the Cook Inlet area.