The following information comes from the documents themselves:

BushGuardmay4.pdf:

/ModDate (D:20040908210832-04'00')
/CreationDate (D:20040908210823-04'00')

BushGuardmay19.pdf

/ModDate (D:20040908210815-04'00')
/CreationDate (D:20040908210807-04'00')

BushGuardaugust1.pdf

/ModDate (D:20040908210739-04'00')
/CreationDate (D:20040908210704-04'00')

BushGuardaugust18.pdf:

/ModDate (D:20040908210759-04'00')
/CreationDate (D:20040908210748-04'00')

So for what it's worth, the documents were all created using Acrobat 5.0 Image Conversion Plug-in for Windows on Wednesday 8th September between 9:07 and 9:08 PM (though I won't speculate about a time zone).

Give up the 'original' copies, Kenneth.