Recently I downloaded this version and immediately ran into problems with it. The first was the fact that it came with an installer which did not ask if I wanted it installed in FS98, FS2002, FS2004, and CFS1 and 2. As soon as I launched the installer it installed this version into all of the above. Why it installed PSUIPC in CFS1 and 2, when neither use it, is a mystery to me. I would REALLY prefer to install FSUIPC manually because of the following problems with trying to run it in any previous version of FS to FS2004...
FSUIPC 3.999s (why not simply round it up to 4.0?) ran fine only on FS2004....
Contrary to what Pete's website states this version does NOT work in either FS98 or FS2002 (at least not on my system). I didn't discover this until a couple of days later when I loaded a new aircraft in FS2002. The plane appeared ok but when I switched to the cockpit view I found myself looking at the pilots seat instead of the 2D instrument panel. Coulcn't switch to the panel view or any other cockpit view. When I pressed S to go to the VC panel view, instead of getting the VC panel I got a panelless exterior view which spun wildly, non-stop, in the vertical. Pessing S again got me to the normal tower view then back to the unswitchable cockpit rear view....Restoring FSUIPC 3.90 from a backup got FS2002 back to normal.
I then tried running FS98, which I still have on my system (you don't just dump an classic just because a new version comes out, at least not in this case)! It crashed immediately. After I restored FSUIPC 3.70 from a backup FS98 was back to normal.
Even though this version did seem to work ok in FS2004, I restored verion 3.98a to FS2004 as well. While I was at it, I upgraded FS2002 to this version and it seems to work fine. I tried upgrading FS98 to 3.98a but it cashed right after I click on "Fly Now"! Same thing with 3.90. Only FSUIPC 3.70 seems to work with FS98 properly unless something in the FSUIPC.ini file needs to be adjusted so versions later that 3.70 work with it (though is there any real need to update FS98 to a newer version of FSUIPC?). Diito when it comes to getting FSUIPC 3.999 to work with FS2002...
Unless someone can tell me how to get 3.999s to work in FS2002, I think I'll just stick with FSUIPC 3.98a for FS2002 and FS2004. Can anyone tell me where I can get a full installation copy of FSUIPC 3.98a (it was installed in FS2004 when I installed either PMDG's B747-400 or Quality Wings B757...)?