I have the 800/900 installed already .Do I have to remove it to put in service pak 1 ?this is all I want for now. I will buy 600/700 at a later date.

You can just install the sp1 over your current install if you want.PMDG recommends reinstalling the 800/900 first to ensure a clean setup.

OK Thanks

To avoid any problems, it is suggested to remove current installation, clean FP files and any panel configurations files.BR