adding sidebars to dogcare template

[joey9876]

hi!
i want to add side bars to dogcare template
http://www.freewebsitetemplates.com/preview/dogcare
http://www.freewebsitetemplates.com/...mplate=dogcare

and i cant figure out what and where to write it on the css file..
every time i try the whole template crashes

what should i add to the code?

i want side bar from the left side and a side bar from the right side
in order to put small pictures in each of them

thanks!
joey