My boss told me to create some pages for Drupal 6. Problem is that I never used Drupal. There's ubercart module 2.1.1 and I need to completely remake current layout. I found file page-cart.tpl but the problem is that on the place where the actual form markup should be, there's just echo $content; I've googled and still can't understand where the form code located. I've tried to search through files but didn't found anything that more or less looks like cart table layout.
Short version of what I have right now:
Short version of what do I need:
I would really appreciate if you give me some tips how can I change this layout.