more image formats?

I was wondering if there is a way to add more image formats, like .jav and .swf to the greetings. I would love to have the .jav format because it will enable the use of java applets, like the lake effect, to be used with the cards. A belated thanks for adding the poems capability. I am sure there would be a way to add these 2 formats, jav and swf. Thanks.