http://www.hdrlabs.com/news/index.php?i ... 5354178910
You still have to pick the exr alpha format, but hey... at least Chris Cox finally 'got it'......
link to plugin:From Adobe page:
Browse to the EXR file that you want to open.
In the file formats list, choose OpenEXR Alpha.
Photoshop treats the ‘A’ channel data as an alpha channel instead of transparency.
http://kb2.adobe.com/cps/883/cpsid_88310.html
The page states CS5, not tested in CS4 yet ;)
rob