I found this nice little freeware program called PictureDicer made by a company called ShoeString. It takes large graphics, like this one, and cuts it into smaller sections. Then it arranges the whole thing in HTML so you can post it to a webpage. It really helps speed up download time. Here is where you can find it:
If you can not find it at either of these sites, email me and I will send you the zip I have.
(Thanks to JASC Software for including a knife tool in PSP 7!)