Active record help

[eluser]bradleyg[/eluser]
Been trying to work this out for a while... just can't get it.

Search param 1 will either be an email or username.
Search param 2 will be an array of regions (integers).

Code:

$param2 = array(2,3);
$this->db->where_in('region', $param2);
$this->db->where('username', $param1);
$this->db->or_where('email', $param1);

I'm not very good with mysql so excuse the incorrect syntax.

Code:

select * from table where username = $param1 OR email = $param1 AND region = 2 OR region = 3;

Any help?

Thanks