Hi. I just want to know how do work those add-on's together because I have seen in the virtual stores that REX require Windows XP or Vista and they don't mention Windows 7. And I would like to know if I can set REX instead IVAO weather. I think it could be done turning off the weather engine. And lastly, can you tell me if is there any problem with the 737NGX and REX? That's all I need to know. thanks in advance.

I am running REX with Windows 7 64 bit. I works just fine. I also fly on Vatsim not IVAO but yes you can remove the Vatsim/IVAO weather and use the REX weather program. Not a problem. Lastly, no problem with NGX and REX. Mark.

REX works very well with ASE (best weather engine). I'd turn off all IVAO weather and use REX.

Thank you so much for your fast answers. And what do you tell me about the engine that downloads and updates REX weather?

I run WIN7 64bit, with REX and IVAO and it works very smooth. My Specs are i5, don't remember wich one XD, HD 6850, 4GB, HD 500GB