Service tax registration for "renting of immovable property"

Hi Service Tax Gurus,

I am trying to register with Serivce Tax dept for  service tax that is applicable under "Renting of immovable property services". I am receiving rent from three commericial properties that have leased out. The gross income is more than Rs. 10 lakhs.  I will be registering ST-1  with service as "Renting of immovable property services"

Please help me with the following queries

1) Do I need to enter the address details of all three commerical properites in any form ST-1 or any other form?

2)  in ST-1 form I will be entering Consitution of Business as "Proprietorship". Is this correct?

3) in ST-1 form "Nature of Registration" should I select "Single Premise" or "Centralize Registration for more than One premises" 

Thanks a lot in advance.

Salim