Yes, but if you have lots of other code on your page then it's 100% feasible that the wizard could install it before, after or right in the middle of that code thus causing problems. The wizard may well put the WebAssist code in the correct order but you are still at the mercy of Dreamweaver in terms of "weight" by your own account.
We're using WebAssist SecurityAssist. Does it not have a facility to secure pages after login?
Thank you
NJ