making some links

[scriptgurl]

how can I make my logo a link to my home page? where / which file should I edit?
Can I use html to create a link in the description? How can I do that?

[admin]

In header.tpl file Find

<td align="right" width=212 >[img]{$baseurl}/templates/images/logo.jpg[/img]</td>

Edit this as required. This is not HTML, it is smarty template. Take a copy of original file before making any change.