Load the values for the properties existing in Teststep of a Load Test from file

Hi

I am executiong a load test with  1 test step

i have total thread count of 3.

one teststep of mine looks like


       
        12
       
        SoapUI Pro
       
        GBR
   

I am having a properties file with 300 booknames

i want each thread to put book buy requests taking booknames one by one  from my properties file

if u can provide some sample code for this requirement .it would be really helpful

Thanks & Regards
Karthik M