Thanks.

As I recognized, there is a little bug, when you initilaze the first register_post_type by using admin_init , if your rewritng setting is true you recieve 404 error.

But if you go to the Settings->permalinks area then doing nothing just close. Your slug will work as normal. I couldn't find the reason, why this occurs.

Also, adding a meta box to custome post type is a bit unclear at the wordpress codex page.

Wondering how I might add additional fields - not a new field but, say a second or third list data field. Sort of like what happens when you click 'Add Custom Field' in the Custom Fields box.

I'm totally lost on this so any thoughts or suggestions appreciated!

To Frank, Thanks for this example. Much better then what I found else where. Hopefully the "3.org" update includes info like this in the codex!

Simply check the $post->page_template to see if it matches the filename of the template you're looking for as follows:

if( function_exists( 'add_meta_box' ) && IsSet($post,$post->page_template)) {
if ($post->page_template == 'page.php')) {
add_meta_box( ....);
}
}

NEXT QUESTION
How to add a file upload field that handles images in a WordPressy way (ideally can select from media already uploaded, does resizing, etc).