FSX Acceleration & FS9/FSX Addon Aircraft

I believe that I read somewhere that people had problems with their FS9 and FSX addon aircraft working properly after installing FSX Acceleration/SP2.
Are there problems? I have a lot of FS9 and FSX addon aircraft that I have downloaded from this site and others that I want to keep flying. I also have MegaSceneryX addons along with UTX USA/Canada and FEX and right now these work great and I wonder if Acceleration/SP2 will mess them up.
I am interested in FSX Acceleration soley for the FA18. Right now FSX runs great on my computer and I do not have any problems.
Regards to all who respond,
Rod
Are there problems? I have a lot of FS9 and FSX addon aircraft that I have downloaded from this site and others that I want to keep flying. I also have MegaSceneryX addons along with UTX USA/Canada and FEX and right now these work great and I wonder if Acceleration/SP2 will mess them up.
I am interested in FSX Acceleration soley for the FA18. Right now FSX runs great on my computer and I do not have any problems.
Regards to all who respond,
Rod