Hmm... I think you should clarify what exactly you want to do. It seems to confuse people.
If I got this correctly, you want to connect your GP2X to your TV using the cradle, right?
But your TV doesn't have S-Video, so you want to use SCART instead, right?
From what I can tell, the first SCART cable you linked to is a VGA to SCART, meaning you would need to convert the VGA to S-Video in order to be able to plug it to the cradle.
If it's the second SCART cable you linked to, the composite to SCART, then you would need to convert the yellow composite plug to a S-Video.
So it's like this then:
GP2X
=EXT=> Cradle
=S-Video=> Plug converter
=SCART=> TV
Did I get that correctly? :huh:
(As far as I can tell, there would be no need for the GP2X 3m TV-out cable at all.)
EDIT: Woops, already too late in replying...
Good luck with it then.