As we said on the phpbb auto installer, we do not provide support for phpbb, you need to refer to their site or related phpbb sites for support on their mods, modifications, styles, etc.
I'll help you with these two questions since they are answered for you on the phpbb site, under support, under knowledge base.
How do I replace the phpBB2 logo with my own?
Aaah, that old demon which seems to be continually popping up around the support forum. "But am I actually allowed to change the logo to my own?" I hear you say. Yes you are. There is nothing wrong with changing the default subSilver logo. And there are 2 ways to do so.
The first way is by changing the path of the logo. Upload your logo to templates/subSilver/images and call it logo.gif or something like that. Then, look (near the end of the document) for:
Code:
<td><a href="{U_INDEX}"><img src="templates/subSilver/images/logo_phpBB.gif" border="0" alt="{L_INDEX}" vspace="1" /></a></td>
Simply change the bit highlighted in red to the path of your own logo. Easy or what??
The second way to change the logo is even easier. Just overwrite logo_phpbb.gif with your own logo and upload it to templates/subSilver/images and call it logo_phpbb.gif. Couldn't be easier!