if it's still one block image, you can use fireworks or photoshop to slice your image, so your page not to heavy. then you can export it to html, and you can give some code to your html page with any web developer software. I use dreamweaver to develop my web page. you can use so many feature in dreamweaver to optimize your web page. even you don't need to write any code to your page, dreamweaver will do it for you. But it's much better if you understand about html,css,java, etc.
i hope my advice can help you.