I’m posting this here as there doesn’t seem to be any documentation on how to do this. The WP e-Commerce plugin is a decent shopping cart plugin for WordPress, unfortunately it’s documentation is rather poor!
The breadcrumbs (once enabled via the settings in the admin panel) display a breadcrumb trail on your product pages. by default is looks something like this:
Store Name » Products Page » Category Name » Product Name
To edit the output you need to edit the function in the theme files. The function is:
<?php wpsc_output_breadcrumbs (); ?>
You can pass an array of arguments to the function. Your options are:
'before-breadcrumbs' => '<div class="wpsc-breadcrumbs">', 'after-breadcrumbs' => '</div>', 'before-crumb' => '', 'after-crumb' => '', 'crumb-separator' => ' » ', 'show_home_page' => true, 'show_products_page' => true, 'echo' => true
Now simply pass your arguments to the function, for example:
<?php wpsc_output_breadcrumbs ( array ( 'crumb-separator' => ' > ', 'show_home_page' => false, ) ); ?>
The above would display breadcrumbs with ‘>’ as a separator and removes the homepage:
Products Page > Category Name > Product Name
I also think its best to put your breadcrumb function in a separate file e.g ‘wpsc-breadcrumbs.php’ then include it in each instance:
<? include "wpsc-breadcrumbs.php"; ?>
This way you don’t need to edit it multiple times should you decide to change something in the future.
I hope this can be of help to someone!

The huge array of plugins available for WordPress is one of it’s most appealing aspects. Unfortunately not all are cross-browser compatible especially with older versions of Internet Explorer.