use the built it multiple photo function:
1.  go to admin > tools > Image Handler2
2. Select a Category with Products ... 
3. Select a Product to View and Press Display ...
4. Click "new file" on the right
5. below 'Default image file' click 'browse' find an image and click ok, then save
6. you have just added a new image, that’s all you have to do

Or
You can insert images in the description of your item buy clicking the insert image button that looks like 2 mountains and a sun ,
Click on the image then go to the tab called "Upload" then Browse, then click send to server, then in the image info box change the size of the image with to 200, then set the alignment to right,  and then click ok, and your image should be in your description.

Or

Use insert your own HTML by pressing the SOURCE button while editing a page.