Cisco 3750 Stacking Q

I have two WS-C3750X-48T-L  and I want to stack them together to create one switch with 96 ports.  Do I just cable them together and the 3750s will become a stack automagically?  Or is there more that needs to be done?

 So here is what I would do with two switches that were already in production with configs on them.

#1 - make sure they have the same IOS on each them.  If not update one or the other so they are the same.  This just makes things easier.

#2 - Whichever switch will be on the bottom - issue a write erase and turn it off.

#3 - Cable the switches together with the stack cables criss crossing each other.

#4 - Power on the bottom switch

After it boots the top switch should recognize the 2nd switch as part of the stack and if you do a show ver it should show you that there are 2 switches in the stack.  The boot up takes a good bit on the WS-C3750X-48T-S   so be patient.