Karen
It's important to distinguish between
filenames and
picture titles.
If you want to name the files you must do his before you bring them into iPhoto. You can use an Automator Action or any of a number of apps like
File List. In this scenario you would use Image Capture to bring the pics onto the Mac, rename them then import them.
Here's an alternative, using picture titles. Import the Pics into iPhoto then use the Photos -> Batch Change command to set the title on groups of photos. These titles are what you see and use in iPhoto. You never need the Filename in iPhoto. If you want to export a file you can rename it with the title in the File -> Export command.
My guess is that you want to name the files so that they will be easy to find. In iPhoto you do this by
sight not filenames!
There are three ways (at least) to get files from the iPhoto Window.
1.
Drag and Drop: Drag a photo from the iPhoto Window to the desktop, there iPhoto will make a full-sized copy of the pic.
2.
File -> Export: Select the files in the iPhoto Window and go File -> Export. The dialogue will give you various options, including altering the format, naming the files and changing the size. Again, producing a copy.
3.
Show File: Right- (or Control-) Click on a pic and in the resulting dialogue choose 'Show File'. A Finder window will pop open with the file already selected.
So the same result - it's easy to find your pics - but a different methodology.
Regards
TD