The world is moving into the PDF Presentations and its good to create a mockups in pdf format instead of sending multiple JPEG to superiors or across the team.
Thats good then how can we do this ?
Make all your JPEGs ready.
Open Photoshop.
Drag or open all your JPEGs into Photoshop
Now select File Menu, select automate then PDF Presentation.
A popup will open select Add Open Files
you can arrange by dragging up and down
ofcourse you can browse and include other images also
Select multipage document or presentation.
Click SAVE thats it its done 
Tags: Mockup creation, Multipage PDF, PDF Creation
Its great start!!