Firefox Problem [How u Fix this?]

Ok, I have firefox v1.0 and I went to packetnews.com. After I searched, a message came up asking me to grant the permission for packetnews to install 'software' on my desktop. I said no and "remember preference". Now I understand that without the ability for it to install the 'software', It wont copy and paste when i click the pack#. I have the signed applets code base set to true in (about:config). Copying and pasting works fine in IrcSpy.com because i allowed it to install the 'software'.

Is there any way that I can reset these settings? I want Packetnews to install the 'software' so that I dont have to manually do all the work.

Thanx ;)

P.S. (I already tried Uninstalling and Installing) :D

Tools\Options\WebFeatures\
Tick the box if its not already ticked that says " Allow websites to install software" then go across a bit more and click on "Allowed Sites" and put in the website address.