Define different functions for every specific functionality in the library files.
Associate all the library files with Quick test.
for eg: login,Account search take this two functionalities
define the function for login save this files with extension .vbs this is library file
define the function for Accountsearch save this file with extension .vbs
Now u associate these library files with Quick Test using
Test->Settings->Resources->add the library files
write this statement as first in ur test script
Executefile "path name of the .vbs file"
Now call the function in Test script using select case decision statement
To execute this functions we are passing keywords from datatable.
select case key1
In datatable write the keywords with column name functionality