I just learned how to do this! I love it and ebay makes less money, so everyone but ebay wins!
I do it this way:
I write the ad using the normal format, then hit the HTML tab, insert the picture HTML links then click back to the normal format. I do use the "free" one picture ebay allows for the gallery picture.
Here is the result:
http://cgi.ebay.com/ws/eBayISAPI.dll...MESO:IT&ih=019
__________________
1971 Paramount P-13 Chrome
1973 Paramount P-15 Opaque Blue
1974 Raleigh Professional Blue Mink
1991 Waterford Paramount
Holland Titanium Dura Ace Group
Holland Titanium Ultegra Triple Group