The walkthrough and other extras can be found on Grey Clan's homepage. Before visiting it, please get MOZILLA FIREFOX, because Internet Explorer might not display certain parts of the site properly. It takes only a little time to download and install it, and it won't use much space on your HDD. You can still use Internet Explorer if you have Firefox installed.

You can find the walkthrough here: http://greyclan.blackwyrmlair.net/ep1/extras_4.html
There are other extras (hints and battle & quest solutions) as well on that page.