I am sorry for the confusion and thanks for your efforts to understand my problem. Let me make it clear this time...
I have both index.html and index.php under root directory. My apache server gives the priority to index.html and displays it by default. This page is nothing but a simple welcome image with a link to index.php for access to Zen Cart's main page. I want both pages there.
However, when users click the logo, it opens the index.html again and they see the welcome message again, and the y have to click the image to see the Zen Cart pages, which might be annoying. So, I would like to hardlink the logo to index.php, so users have to see the welcome screen ONLY ONCE, and then stay in Zen Cart pages all the time. When click the logo, they should return to the main page of the Zen Cart, not to the welcome screen.
That's why I asked if it's possible to put a direct link to the logo, such as google. If this is possible, I will just put "http://www.mywebsite.com/index.php" there. I haven't launched the site yet, so I can't provide a link to the website, sorry :(( I must find a good hosting company first!
Thank you very much... Again!...