post_get and custom post types

Hello forumers ! I have a trouble that don’t let me sleep.

Look:

<?php
$myposts = get_posts(‘cat=8&showposts=2‘);
if ($myposts) {
$uc=array();
foreach ($myposts as $mypost) {
$uc[]=$mypost->ID;
}

This code displays the categories in the webpage, the 2 last categories. But I’m not using categories anymore and I need to put the custom post types. I made custom post types for a better control, and what I need is to call the custom post type, not the category.
And I dunno how should I do…

Any ideas??

Thanks !!!!