multiple images in K2

I am using K2 but K2 allows inserting 1 image only on top of the text. I want to insert multiple images with captions in different places of the item. If I do this using joomla features, which is doable, captions are seen when I publish the item.
how do you insert more than one images with captions in K2?
thanks,

I forgot to say I am using joomla 1.7.3