Trying to change upload directory on "download" post type

gistfile1.aw

<?php

function edd_load_upload_filter() {
	add_action('load-edit.php', 'edd_change_downloads_upload_dir');
	add_action('load-post.php', 'edd_change_downloads_upload_dir');
}
add_action('admin_init', 'edd_load_upload_filter');

function edd_change_downloads_upload_dir() {
	$current_screen = get_current_screen();
	if($current_screen->post_type !== 'download') { return; }
	add_filter('upload_dir', 'edd_set_upload_dir');
}

function edd_set_upload_dir($upload) {
	$upload['subdir']	= '/edd' . $upload['subdir'];
	$upload['path'] = $upload['basedir'] . $upload['subdir'];
	$upload['url'] = $upload['baseurl'] . $upload['subdir'];
	return $upload;
}

Ahh, I didn't know you were dealing with the media uploader. :-P In that case, check out the Media.php class file in Soliloquy to see how it is done there - it may be helpful for you in your case as well. :-)

@thomasgriffin, whoops, yeah, should have mentioned that. The solution Brady suggested above works perfectly.

Sweet deal - glad you got it working. :-)