Your topic may get moved to the 'Adding aircraft traffic......' forum. If it does, to avoid confusion, edit it to indicate you are installing for FSX.
The program installation is straight forward and described at WOAI, WOAI Installer page. Airline installation is also straight forward. Do Not unzip the airline downloads, WOAI is looking for the zip file.
-Aircraft: I would suggest you do not install the ai aircraft in your ..\SimObjects\Airplanes\ folder. FSX allows you to define additional simobjects folders. This keeps ai ac seperate from your default ac to avoid 'accidents' if you want to remove them later.
Create a new folder in FSX, named 'AI Aircraft', example; ......\Microsoft Flight Simulator X\
AI Aircraft\...
Then in the FSX.cfg>[Main] section add the line...
SimObjectPaths.x=AI Aircraft
Change the x to the next number in sequence.
When you run the WOAI installer you can define that path for the ai aircraft (FSX subfolder)
(Hint: I do the same for my addon ac. Created an
Aircraft folder and appropriate entry in the fsx.cfg file.)
-Flightplans (traffic*.bgl files): WOAI traffic files are in FS9 format. FSX will use FS9 traffic files but if it uses FS9 traffic files it may ignore FSX traffic files. You may lose the default aircraft traffic and the Ships and Ferries traffic and any other FSX format traffic you have installed.
The fix (if you want to keep FSX format traffic) is to convert FS9 files to FSX format. AI Flight Planner (AIFP) can do that. Download here:
http://members.shaw.ca/aifp/. (WOAI note: Converting will cause a 'fail' if trying to use the 'Expert' mode in WOAI installer. I keep backups of the WOAI FS9 traffic files for that reason.)
-No problem with removal. To remove completely, just remove the ai aircraft and WOAI traffic files, they're easily identified in their file/folder names. If for some reason I want to do selective removal ( individual traffic file and livery) I use the WOAI installer's 'Expert' mode. I just temporarily move the WOAI FS9 traffic files back into ..\Scenery\World\scenery\ folder to avoid the 'fail'.
All in all, a pretty simple process once you've done it a couple of times.
Dave