I'm an XP64 user and I believe that the time for x64 OS has come.
PDFCreator works correctly, but a specific build would be great, IMHO.
1.) I dont know, why you should make a x64 build. PDFCreator only handles some parameters and the main conversion work is done by ghostscript.
2.) I dont know if it is possible to generate x64 Code in VB6, but I think not.