Simon,
I have PM installed on MacOSX. I have a library of 20,000+ images. I need to tag about 7000 of them. I have the image numbers that I ned to tag on an Excell XLS. Do I need to grind through the entire collection and tag manually?
You can use the 'Load Selection...' command on the Edit menu to load a text file that lists the names of the images you want selected. You have to have some of the images loaded before you load the selection file. Once the images are selected. You can simply tag them using the Tag command on the Edit menu.
You will have to manually open up the folders containing the images into contact sheets (I don't recommend opening up 20,000+ images at once) and use the 'Load Selection...' command and the Tag command on each folder you load, but it should be fairly efficient.
-Kirk