Good morning...I purchased the 737NG series (600-900) several weeks ago but have not tried to install them until last nigt [been reading :-) :-) ]!When I double-click either of the .exe files (PMDG_737_THE_NEXT_GENERATION and PMDG_737_NEXT_GEN_800_900) a DOS command window blinks open and closed and that's it! No error message or other action.File sizes are: 73,892,766 and 47,076,371 respectively.I am running XPProSP2, P4 3.0, 1GBRAM, FS2004.Suggestions... or solutions? Thanks.don mac

We have similar computer specs. I re-installed all and was ok; so I think that maybe the files are corrupted. I would try downloading one of the files again and give it a shot. Turn off any anti-virus software too; shouldn't really hurt; but ya never know.The file names I have is -PMDG_737_THE_NEXT_GENERATION_V1-3.EXE 69,496 KBI don't know the file names for the 800/900. I only have the 600/700.There is also a removal tool -PMDG_737_REMOVE.EXE