The best way is to write the text as text and not split up a huge image to be a web page. Search engines cannot read graphics, so would treat your page as having no text content. I've had to fix a number of pages done like that where someone wanted to change some of the text, like a price, time of day, or something else minor, and the whole graphic had to be revised to delete the graphical text, or the graphics had to be remade again. Believe me, it's MUCH better in the long run (and often in the short run) to keep text as text than to make the page out of one large picture.
Lee