There's not enough info in your post to help you much. We are, for the most part, just other users here.
The password you have forgotten, is that for your Dreamhost panel account? If so, try contacting them, again using this form:
Have your correct billing info at hand to prove who you are and that this is your account.
If the passwords you have forgotten are internal CMS passwords (to a WordPress dashboard, for example) then use your Dreamhost panel access for access to your databases to reset the password or email to one that you can use.