need help with cpa redirector 2

i need help setting up cpa redirector 2

so far this is what i have done:

made a wordpress blog (wp 3.1)

set up cpa redirector 2

edit the header

edit the permalinks (www.mywebsite.com/wordpress/%postname%/)

and now it is asking me to update my .htacess how do i do that ?

this is all new to me so if you could explain it. it would be very helpful.

thanks