Where is the vibrate option for the Samsung rant?

I just got my new phone. I don't use sound for my text messages ever. Every phone I have ever had gave me and option to have my text messages vibrate. I can't find this option on my Rant. Can someone help me? Am I even given this option? And, if not, how could they take that away? I can't have a ring tone if this is true. I text too much to have something ringing every time I receive a text message.Where is the vibrate option for the Samsung rant?
To set the vibration option for your txt messages ONLY, go to Menu%26gt; Settings%26gt; Sounds%26gt; Volume%26gt; Advanced%26gt; Text Messages%26gt; Separate Volume, Now use the volume control on the left side of the phone and put the volume all the way down to ';Ringer Off'; and click on the left softkey (top left button above the speaker key where it says ';vibrate';) and finally press ok. That should do the trick...Where is the vibrate option for the Samsung rant?
I have the rant too and its on the left side of the phone where the up and down arrows are... just keep going down... its second from the bottom
on the left side keep pressing sown till it says vibrate only
i have the purple one! on the left side keep pressing sown till it says vibrate only