There is a "Files" link in your user control for the specific comic, but the last two times I tried it it didn't keep the files. You can upload them there and use code such as:
<a href="URL of image, linked page, etc">NAME OF LINK</a>
You will be given a location of the file after you upload it, if it is working. If they don't load there...as they didn't with mine, you can use a program such as Yahoo's sitebuilder, or other such website creation tool to create pages. you would just have to use the address it gives you to do it.
I use the former and often have to use "http://www.darwinsdomain.net/images/WHATEVER.jpg" (for images) or "http://www.darwinsdomain.net/unlinked/WHATEVER.html" (for pages) in its place. These of course are simulated pages and images...
I hope this helps. I don't know that I can recommend another program that you could create pages on...I know they're out there...I just don't know what they are.