order by field value in custom post types?

I use a plugin Directory Listing and created a form field that is displayed by this code:

<div class=”field-value wpbdp-field-eventdate meta”><label>Event Date:</label>

The plugin creates a directory with a custom post type but I want to use it as an event list calendar. I want to display the excerpts and full listings in ascending order, meaning what’s up next followed by events happening later on future dates progressing on down the page. Is there a way to do this with your plugin, or can you recommend something that will do this? Thanks.

http://wordpress.org/extend/plugins/order-up-custom-post-order/