Where is the Login script


I have this crazy problem. I have installed an HP printer (I know I should not use HP but it was a gift) and every time I login I find the HP printer in my dock. So I remove it from the dock. Log-out, log back in and the HP printer is AGAIN in the dock.

So I checked in my control panel/accounts/startup items to see whats there. There is no HP program.

Therefore, I was thinking that there must be some "login script" that Tiger runs when I login and HP has added some instructions there.

Any ideas where such a file may be, or how to definitely get the HP printer out of the dock?