Did you test it with Windows 64? Also, do you know if this driver allows merging of multiple reports into one?

No, I did not test it with Windows 64. I do not know if it allows merging - I use Amyuni for that. The only reason that I went to Bullzip is that I had one report that Amyuni couldn't handle (for reasons unknown to me - when I tried to generate the PDF using Amyuni, Amyuni just locked up and the report never finished)