I don't know who to merge PDF's in photoshop but you can in abobe reader.

I'm not sure why you have to keep logging in, has this only just started to happen? what system are you on? Mac/PC, Windows XP/Vista, Leopard/Tiger and what browser are you using?

Hello, Toon thank you for the help with how to convert images to PDF in photoshop, do you know how to merge the two PDF files created by photoshop into one in photoshop ?

I had to reply to you like this cause whenever I try to reply to my posts on the forum it keeps asking me to login, yet when I do, and I go to reply to a post I have to log in again, very odd.