For the default uploaded run this query on your database:
Code:
ALTER TABLE `users` CHANGE `uploaded` `uploaded` BIGINT( 20 ) UNSIGNED NOT NULL DEFAULT '2147483648';
As for setting members to confirmed by default open takesignup.php and find this:
Code:
(!$arr[0]?'confirmed':'pending')
Change to
Then find these 2 lines:
Code:
if($arr[0])
mail($email, "$SITENAME user registration confirmation", $body, "From: $SITEEMAIL", "-f$SITEEMAIL");
And comment them out