This Applescript will convert a file into a Photoshop file:
set this_file to choose file without invisibles
set the target_file to (choose file name default name "newimage.psd")
-- convert file reference in alias format to path string
set the target_path to the target_file as Unicode text
try
tell application "Image Events"
-- start the Image Events application
launch
-- open the image file
set this_image to open this_file
-- save in new file
save this_image as PSD in target_path with icon
-- purge the open image data
close this_image
end tell
on error error_message
display dialog error_message buttons {"Cancel"} default button 1
end try
I got the original from here:
http://www.macosxautomation.com/applescript/imageevents/08.html
and then modified it slightly so it does PSD files rather than TIFFs. You still have to interact with it, twice, to pick the file and name the file. To truly batch process, as in drop a folder of image onto a script of some sort, you would probably do better to simply make a Photoshop droplet IN Photoshop, and use it. Been quite awhile since I last made a droplet, but they will convert and rename automatically.
Francine