I don't think you can redirect the response but a good work around would be to make your own response object and do a string replace "response" with "myresponse" on the code.
You will need a dummy function for every response object function you use in your code. I have only replaced the "write" function
use myResponse.getString to get your string
Set myResponse = new resp
public function write(byVal str)
buffer = buffer & str
public function getString()
getString = buffer