Array $imagelist:
Array (
[additional] => Array (
[count] => 2
[image] => Array (
[nokia_e61_1.jpg] => Array (
I don't like smarty for this, nevertheless I use it. Here's extract form documentation
{$foo.$bar} <-- display variable key value of an array, similar to PHP $foo[$bar]
To be able to do it, you have to
{assign var='key' value=$getvars.imagename}
{$imagelist.additional.image.$key.name_body}
Hope it helps