I am curious if there is a way to send an attachmemt id from a Custom Object to the out of the box Email functionality with a Custom button. I currently use a global web service to send an email with an attachment but it all occurs behind the scene and the user can not interact with the web service. I don't want to create a VF Page to mimic the Email Functionality. 

Quote PDF allows me to do it by sending the docid. Is there a way to to the same thing on a Custom Object if I generate the PDF as an Attachment for the custom object?