How to insert image in Special Messages?

[Temple]

I'm trying to insert an image into a special message. I can get to the point where I need to add the Href address, and when I put the image into an absolute location like my c:/ root the message finds it with no problem by using an Href like "c:/explosion.jpg". What I want to do is be able to zip the image with the .scen file and use some Href value with a relative address, so the message will look in the same folder where the .scen file was dropped. I've experimented but I haven't had any luck finding a good Href value, but then my old DOS skills are pretty rusty. Any help would be appreciated.