A simpler solution might be to find another plugin. There are lots of image plugins.
If you really want to use this one, the iframe doesn't work for you, and you know or are willing to learn some PHP, then there is an advanced solution. You could run the ugly page through some string functions to strip out the offending code, then put just the code you want into your page.
This thread can give you some options on how to include PHP in a MZ site.
This post will give you some ideas about extracting good content from an ugly plugin.