My product images are running off the template.

I'm a noob but I can edit code. I just dont know where.

How can I set it to only display two of the images per row ( to keep the size the same ) and then move the others to a lower row or is that possible.

Also I've heard of the wysiwyg editors but I cant seem to figure out where they are or how to use them.

I have dreamweaver and frontpage. Will they work?