Like Hagar said, .odt can be implenmented with .docx, as well as .xml via odtxml. How long did you spend on the document, and is there a way your can retrieve your images back? If the document is very importanet, perhaps you could start on the docment and save it in .odt (and .docx if you wish, just make sure to have .odt as well), make a back-up copy. Then try XML again. If there is no absolute way you can retrieve your images, then perhaps you could post your document here and see if anyone may be able you.
But this is really my suggestion (for the most part) is to help prevent something like this from happening. Unless you have a back-up copy of your document, there is not much to be done.
Cmiller