've been searching the web to no avail for this, so maybe my experience will help somebody. I've downloaded the standard graphic pack and put it into /home/user/.travian/t3_en_standard/ then followed the \travian\faq - Graphic Packs instructions to active the pack, but no matter what I did testing kept giving me "Not Found" error. The way I finally solved this problem was to first use a local webserver graphic pack (I suppose using an on-line/webhosting located pack would work as well) and then trying to switch to a local pack. So, now my local pack is active and I won't load the travian server as much anymore.
can someone explain local webserver and how its used?