which of my p/w sceneries to install?

[brantmacga]

Just reinstalled fs2004 after being out of it for awhile.

I noticed that I have UT-USA, REX, GE pro and Flight Environment.

I went to the flight 1 website and it looks like GE pro is similar to UT-USA, and FE is similar to REX.

Right now I have UT-USA and REX installed. Is there any need to install the other two?

Thanks
-b