Displaying Content set on a page in Template content areas

Hi, We have developed out site manlybiketours.com.au and the site template has 1 main content area (which displays page content or the blog etc) and 3 or 4 promomotion boxes which link to other page on our site on the right which are a fixed hight and width.

What we’re trying to do is set the content for these promo boxes on each page (each page will have different promo content) and display in the promo boxes when the page is rendered rather than setting them in the template which means they would be set. Eg a page will have page content, then from what I can see 3/4 custom fields with content to be displayed in the theme promo boxes spots.

Can anyone let me know if this is possible – eg to set content to be displayed on a page other than the standard page content? Is there code I can put in the template that enables us to display custom field content from the page rendering (rather than setting it spefically in the template)?

I guess this is more CMS functioanlity but from what I know about WordPress this should be possible – I just can’t work it out.

Thanks in advance for your help,
Wendy