for basic vanity plates, you used to have to mail in the application to trenton and wait(now it can be done online i see). I believe, in the meantime, if you want to drive/register the car, you would have to get regular plates or use ones you already have until you receive the new ones.
and you can get personalized LE plates... and you choose 5 characters, there is no "LE" on the left for personalized
You just need to apply for a NJMVC online account, and you get you username and password sent to you by regular mail.
Here is a screen shot of the online ordering tutorial...
LE plates are in the top right, and thats for personalized plates
edit: the proper link to register for a online MyMVC account is the following
https://emvc.state.nj.us/MVC_MYMVC/AVSStart.jsp
just click "User ID number request" and follow instructions
Once you have an account, go to this link and follow instructions after clicking "get started"
http://www.state.nj.us/mvc/Vehicle/p...zed_plates.htm