Simple question, but I'm thinking of moving away from UT2 towards world of AI to both 1) get some more cargo stuff in there and 2) populate my airports in a more targeted and hopefully efficient manner (i.e., really only need SWA and Delta and a place like MDW). 

 

I remember way back when all their flight plans/AI files were in FS9 format and caused some troubles if not converted to FSX.  However, this was probably 5-6 years ago.  Is this still the case or are they updated?

 You would need to convert them for use in FSX or P3d. Easiest is using AIFP from here

 

 Even though the WoAI installer mentions FSX, it is only for it's different folder tree compared to FS2004.

AFAIK the WoAI files advertised as being for FSX have FSX native models yet still use FS9 format flightplans.

 

regards,

Joe

Thank you all for the input.