I'm currently in the process of trying to fix this HORRIBLE FSX install issue in regard to CAB missing, Error 1334 and Error 1335. The MS FSX screwed this one big time.
My solution has been seen on seeral sites but I myself, also had issues. So, copy all of the FSX content from Disk 1 an Disk 2 into a folder on your desktop and run setup.
My issue was that I was STILL getting error. So...I copied the particular file from the CD that the program told me it couldn't open and clicked Retry and it installed. Oh yeah, I had to copy like 11 cabs from the CD's until it finally installed.
With this said, I do not like this one bit so I'm waiting for my 72 hour call from MS.
Wish me luck!
PS: I cannot believe my 3.2 ghz, 6800 Ultra and 2G of RAM pc cannot run FSX w/out blurries, even with settings at LOW!