Is there a way to change my password to one that I remember?

Of course...
You can edit all your preferences at the main page at http://www.sorcerers.net/cgi-bin/Ultimate.cgi

at

Boards O' Magick
profile | register | preferences | faq | search

part of the page (top right corner of the page). But the browser should be storing your pass/username for a year by default, unless you turned it off. That way you don't have to type it in every time you want to post something...