TDS RATES

I want to Know that if the payee has cerificate of tax  deduction at source at rate which is lower than the rates prescribed wef from 1.10.09 . at what rate should be deduct tax .  for eg in case of rent paid the new rate of TDS is 10% and in the certificate issued to the vendor by Income tax dept states 5% ( incl SC or cess ) or 5% + Surcharge and cess then at what rate should be deduct tax. Also surcharge and cess is abolished even if we deduct at 5%  then should be account for surcharge and cess. Please help a bit urgent...