There are a few ways you could do that actually, but regardless put the SD card in.
First off, you're going to want to root your phone. Click on the sub forum everything root, and follow the root guide,
You can use app's like Link2SD which can move applications to your SD card, or you can use app's like Directory Bind which will allow everything that goes into an internal folder, is just for show it's really stored on your sd card.
Now, if you download a program called ES File Explorer, you will be able to browse through all the files on your SD card.
You can also set up the stock camera to place photos either in the internal or external (sdcard) location.
Anyway, there is a new way out that allows you to basically run a few scripts and it fixs it so everything goes on your SD auton, when I get a chance I'll post the links to the posts.
NOTE: YOU WILL NEED TO ROOT YOUR PHONE