FS Global - fps impact?

Hi,
I plan to get the new FS Global 2008 scenary enhancement for my FS 2004. But do not want to get it if it would have significant impact on my frames per second.
I got 512 Navida VC, 2.5Gh processor and 4Gb memory, currently in dense scenary, weather and lot of AI traffic I get nice fluid 30 fps all the time. Would not want to go below 25. Please let me know how FS Global impacts fps
Many thanks

I use FS Global 2008.

My specs are,

Acer Aspire M5102
2.2GHz
4GIG Ram
9500GS Nvidea GeForce

Not the best of computers but here is my result with a flight around Switzerland where FS Global does its work well with the wonderfull mountins.

Many thanks for the pictures, looks great. What fps do you get?

Ranging from 9 - 33fps

Must mostly high fps. i mostly get low fps when flying with loads of clouds so thats normaly the major course for me and not FS Global