Okay, i am now 100% sure i solved it
Once i installed the game here i made the wrong .htaccess edit and changed
CODE
/public_html/forum/.htaccess
instead, so it did not work
you need to edit the .htaccess present in public_html because this is where the SWF tries to find the arcade/gamedata path
the only edit necessary is:
CODE
<IfModule mod_rewrite.c>
RewriteRule ^arcade/(.*)$ /forum/arcade/$1 [R=301,NC,L]
</IfModule>
of course you might need to adapt to your own structure, for us here is it forum/arcade
Best