[support] Theming specific node (content) types

Hi

This is reference to http://drupal.org/node/17565

I am using a new template file for a new content type I made using CCK. How can I access the individual fields that I created, in the template file ?

I tried this :- <?php print serialize($node->field_idnumber)?> (field_idnumber was the field that I added)

and the output I got looked something like :- a:1:{i:0;a:2:{s:5:"value";s:6:"123123";s:4:"view";s:6:"123123";}}

Now how can extract the data i.e 123123 from this ?

The article mentioned above, says that probably a php code is needed for this ? Can't it be accessed in way similar to title i.e $node->title

PS : I did tried this :- $node->field_idnumber->value but this doesn't seem to work

Thanks and Regards Abhinav Jain