positioning a background picture that is taken from a sprite

Hi I'm new to CSS and Sprite and i've got the following issue.

I had 5 different png files each one 28px 28px.

When i presented them i've changed the width and height to 60px by 60px

now that i'm using a Sprite i can't change the background attributes or position them to the right etc...
because that applies to the Sprite and it adds parts of the other pictures.

Is there anyway for me to grab the 28px by 28x from the background picture - but present it on my 60px by 60px?

Also manipulating the data as i used to when i had 5 separate files - changing the background-position for example?

10x
Kalia