The car-sho.com forum seems to be in pretty good shape. I can navigate around in it by using the php code directly. It looks to me like these guys are just hacking the subSilver tpl files. In particular overall_header, index_body and admin/page_header.tpl.
I would restore all the subSilver files and see what happens. I would also create a .htaccess file and put
www.ulkuocaklari.org.tr (213.243.1.126) in it. Also 72.36.251.84. Like this:
.htaccess contents,
-------------------------------------------
Options -Indexes
order allow,deny
deny from 72.36
deny from 213.243
allow from all
------------------------------------------
Note that 72.36 blocks any ip of 72.36.*.*.*
The Options -Indexes prevents getting an index listing of directories.
They have stored their image at:
http://www.geocities.com/ilkhan147258369/aytt.jpg and I have reported this to geocities abuse.
You can find info on htaccess and a tool to generate code at:
http://www.clockwatchers.com/htaccess_tool.html
Very helpful. I personally have added several bad guys to htaccess file as I'd just as soon they not be able to puruse any part of my site. I don't care about any one from Turkey or Russia. I use the security mod to identify multiple location abusers.
Of course you should also byte the bullet and get on the latest level of phpBB asap.
Regards,
Stan Douglas