I've had success with
CBX Shell Manager on 32 bit Windows 7, and just need to experiment on 64 bit, so I can document what is needed.
32 Bit, the following registry edit is needed
Code:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Classes\.epub]
@="epub_auto_file"
[HKEY_CURRENT_USER\Software\Classes\.epub\shellex]
[HKEY_CURRENT_USER\Software\Classes\.epub\shellex\{00021500-0000-0000-C000-000000000046}]
@="{9E6ECB90-5A61-42BD-B851-D3297D9C7F39}"
[HKEY_CURRENT_USER\Software\Classes\.epub\shellex\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{9E6ECB90-5A61-42BD-B851-D3297D9C7F39}"