Watermark signature.

[Pablo O O O O]

I am contemplating adding a 'Watermark/signature' in the corner of certain photographs. Is there a quick easy way of doing this apart from individual manual operation each time I want to use it. I usually run CS4.For instance can I set up the signature, and position where it is to be used, and one button click, it appears?

[xrrr]

I use Lightroom 3 and it is automatic - I set up an export profile and it auto adds it.

If you are using PS then you could create an action but I am not sure how you do the positioning and scaling. It would work if all of the your photos are the same size as you can use file->automate->batch.