Get someone to take all these FS2004 scenery files and airports, and make them 100% compatible with FSX.
I'd be willing to pay if someone does figure them out.
There are a whole bunch more here - http://www.thaiflight.com/mach/modules.php?name=Downloads&d_op=viewdownload&cid=24 - but I think you have to register to view them.
I'm living in Thailand, and the scenery in FSX sucks for the country. We've got a big FS user base, but apparently no one lacks the knowledge or has the interest to make these things up for us! I'd love to do it myself, but I'm one of those guys who lacks the knowledge and the time to do it.