How to add a 3750 in the existing stack of 3 switches

Hi,
I need to understand the process to add a brand new switch to an existing stack of 3 Cisco 3750 Switches.

The existing switches are in production environment, so if there needs to be any service interruption it has to be minimum.

Can sombody please guide me trhough the process?

This is some configuration info

3750_Stack#show switch
Switch/Stack Mac Address : 84b8.024e.b580
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 84b8.024e.b580     15     3       Ready
 2       Member e0ac.f1f6.0800     1      3       Ready
 3       Member e0ac.f1f6.0500     1      3       Ready

I want to add the new switch as the 4th member switch in this list

I know it would start something like this ...

1. The new switch needs to have the same IOS version as the current switches
2. Turn off the new switch, rack it, and connect the stack cables
3. ??????

Thanks.