OT - almost there, thank you....one user is set, after login the shared sparseimage (volume) mounts, iPhoto loads, opens the shared library....
BUT, not for the other accounts....login, but NO mount of volume, so, when iPhoto opens it can't find the volume. So what I have to do is go to Disk Utility and double-click then it 'attaches' and NOW I see the volume on my desktop as an external hard drive...and now I can select it from iPhoto and all is good.
I don't want to manually attach volume then open iPhoto and point to mount; I want it to work as the other user account, volume mounts on startup, the iPhoto points to volume...have read other posts and nada that I can find to fix; I 'removed' volume from Login Items and then re-added....rebooted, etc....nothing...
Even in Disk Utility when I see this volume name it has 'not mounted' status on status line, of course after File/Open Disk Image, then status is 'mounted'....all users have read&write permissions set and 'ignore ownership on this volume' set
Appreciation any and all help - thank you!