Another way is a Steem patch. I just made one for this game in 5 minutes. Never sure it's 100% but it passes the password protection.
When games uses passwords as protection, are they provided with the dumps ?
Scans are available on the record page when we have them. Unfortunately lot of manuals for games with password protection are either not yet scanned or contributed for Atarimania. In meantime please see here for lots of manuals, they mostly work for ST too. http://amiga-manuals.xiik.net/amiga.php
I do believe that I have a fully functional Pasti dump of Rainbow Warriors. It was successfully dumped with SuperCard Pro and then converted to Pasti without any errors using Aufit.
Thanks for the report :-) The download is removed for now.