Assuming you are viewing from the icons in Windows explorer you could create a batch file in notepad to copy the selected file into a separate directory then call it using the Send To function in explorer.
If you want to try this, copy the text below and paste into notepad.
set tgtdir=c:\pictemp
if not exist %tgtdir% mkdir %tgtdir%
xcopy %1 %tgtdir%
Of course, you can change
c:\pictemp to whatever directory you want to use.
Save it as
copypic.bat in the SendTo directory at:
C:\Users\
(your user id)\AppData\Roaming\Microsoft\Windows\SendTo
--Be sure to use the Save As Type option to All Files (*.*)
Then when you see a pic in explorer that you want to have printed, right click the file, go the Send to flyout and select the copypic.bat option.
When you have transferred them to whatever printing service, you can delete the temporary directory.
Just one possible way...