I own the 737-600/700 package and was just wondering how much better the frames are with the 800/900 upgrade?? Is it quite a substantial frame gain??One more question for fs2crew users of the 737NG, What do you think of it??Thank you very much in advance

I don't think frames would be affected much. The 800/900 package (with patches) also upgrades the 600/700 with added instrument functionality in the FMC/CDU and ND such as adding TCAS. There may be other additions but I've always had both suites to gain full functionality.

Yes like said previously, I dont know about the frame rate gain, but I think everyone should go for 800/900 package as it also upgrades the 600/700 and adds extra functionality, it just makes it a "COMPLETE PACKAGE", I had 600/700 first and upgraded to 800/900 two months later I was impressed even more. As far as fs2crew I would say its a must have for that extra realism, also works with PMDG seamlessly and perfectly with no problems what so ever, although I can see it getting a little annoying to some hard core pilots perhaps, only because its a lot of clicking to do while concentrating. But thats just my opinion, im not knocking fs2crew at all I think their product is absolutely awsome especially if you pair it up with PMDG. What I did find to SLOW my rates a bit is fspassangers add-on I have no idea how and why yet.