windspeed 0 Newbie Poster

I have a 'welcome to our site...' block of text in the middle of the home page on my small site and I want that text block to be swapped for an image as a mouse rolls over a menu item on the left.
My problem is that it seems that Dreamweaver only allows swap image on an image, not a blank space or block of text.
Is there some way that I can get this to work without making the block of text an image with, say, Photoshop because text made into .jpg's looks ordinary and doesn't allow for interactivity like links from words in the text block.
Thanks
Chris