[Cadellin]

I'll give it a go wilczek - not an expert dummy guide writer though

1. Go to AdminCP > Styles & Templates > Style Manager
2. Click "All Style Options" for your theme and select "Edit Templates"
3. Scroll down the list and double click "header"
4. Switch back to vbulletin mod page and select the text from the "replace with" box above and copy it to clipboard.
5. Go back to the header template you just opened and use the search box to find "<input type="text" class="textbox default-value" name="vb_login_username" id="navbar_username" size="10" accesskey="u" tabindex="101" value="<vb:if condition="$username">{vb:raw username}" - This is the first line of the code your going to replace.
5. Highlight the first line in the old code and continue highlighting down until you see the last line of the code your going to replace - I find it helpful to use two browser windows splitting the screen so I can quickly remind myself of what the final few lines looks like.
6. Whilst still highlighting the old text paste in the replacement text over it so it replaces the highlighed text.
7. Click "Save"
8. Load your frontpage to see the results!