Pegasus Mail shows up as an email option in Picasa2's Tools|Options|Email settings. Selecting it simply works. I assume Picasa2 recognized Pegasus Mail as my default email program during install but I can't provide any further details as to how that came about.
I just tested it again to see if I could pick up any clues as to why you're having problems. When I choose to send a image via email the first popup that displays is one to select which mailer to use. Pegasus appears at the top followed by Gmail then Picasa Mail. Once I select Pegasus Mail another popup appears telling me to Alt-Tab to Pegasus Mail. The heading of this dialog box is Pegasus Mail MAPI Interface. It may be that you do not have the Pegasus Mail MAPI interface installed.
More on Pegasus Mail MAPI from http://email.arcm.com/wiki/index.php/Pegasus%20Mail%20MAPI%20Support:
Several programs require your e-mail program
to have MAPI support, such as scanners, fax software, etc. Although
Pegasus Mail supports MAPI, it is not installed by the normal
installer. Luckily, enablng MAPI support for Pegaus Mail is easy.
Locate the file named wpmmapi.exe. It should be
in the same directory is the Pegasus Mail executable file. This is
normally the C:\PMAIL directory. Run the program and select "Simple
MAPI". Do not install MAPI 1.0. When the program finishes, Pegasus Mail simple MAPI is installed. (You may need to reboot.)
Note: You can only have MAPI installed for one mail program at a time. If you install Pegasus Mail MAPI, then all MAPI requests will be handled by Pegasus Mail.
HTH
<p>Pegasus Mail shows up as an email option in Picasa2's Tools|Options|Email settings.&nbsp; Selecting it simply works.&nbsp; I assume Picasa2 recognized Pegasus Mail as my default email program during install but I can't provide any further details as to how that came about.&nbsp; </p><p>&nbsp;I just tested it again to see if I could pick up any clues as to why you're having problems.&nbsp; When I choose to send a image via email the first popup that displays is one to select which mailer to use.&nbsp; Pegasus appears at the top followed by Gmail then Picasa Mail.&nbsp; Once I select Pegasus Mail another popup appears telling me to Alt-Tab to Pegasus Mail.&nbsp; The heading of this dialog box is Pegasus Mail MAPI Interface.&nbsp; It may be that you do not have the Pegasus Mail MAPI interface installed.&nbsp;</p><p>More on Pegasus Mail MAPI from http://email.arcm.com/wiki/index.php/Pegasus%20Mail%20MAPI%20Support:</p><p>&nbsp;</p><p class="tightenable top">Several programs require your e-mail program
to have MAPI support, such as scanners, fax software, etc. Although
Pegasus Mail supports MAPI, it is not installed by the normal
installer. Luckily, enablng MAPI support for Pegaus Mail is easy.</p>
<p class="tightenable">Locate the file named wpmmapi.exe. It should be
in the same directory is the Pegasus Mail executable file. This is
normally the C:\PMAIL directory. Run the program and select "Simple
MAPI". Do <b>not</b> install MAPI 1.0. When the program finishes, Pegasus Mail simple MAPI is installed. <i>(You may need to reboot.)</i></p>
<blockquote class="tightenable"><p class="tightenable top bottom"><i><b>Note:</b> You can only have MAPI installed for one mail program at a time. If you install Pegasus Mail MAPI, then <b>all</b> MAPI requests will be handled by Pegasus Mail.</i></p>
</blockquote><p>HTH
&nbsp;</p>