http://www.fm-base.co.uk/forum/f72/what-roles-and-dutys-best-suit-my-players-t24028.html
You'll get less stick if you post in here mate, and a lot more help.
I know he's a target man, I just want to know how to keep him from being isolated as a lone striker
Cardozo is quite versatile I find, can play as a target man, or as a complete forward, even as a deep lying attacker. I suppose it depends on the style of play and formation you use.