goto tools select the batch test runner. add the items to b 
tested and say run

hey suryanand u are correct i would like one more point 

goto tools select the batch test runner. add the items to b 
tested and say run

if u do the say the same u will get an error before adding 
a scripts to batch testing see that u change the option in 
tools menu->option->run here u have option (allow other 
mercury products to run test and components activate that ) 
and then add the scripts to batch test runner and say run

But in QTP 9.2 we cant slect through "Tools"  "Options' .
can any one say me how to select batch run using QTP 9.2

In QTP 9.2 go to "Tools" then select "options" and in "Run" 
tab select the option-->allow other 
mercury products to run test and components activate that

go to Start-Programs-QTP-Tools-Batch test Run
there u select the scripts whichever u want to run. if any 
script from the batch u dont want to execute just uncheck 
the check box.

hope this will help u