You may be able to change the max_execution_time inside of your script via:
PHP Code:
ini_set('max_execution_time', $some_large_integer);
This should allow you to adjust the max execution time.
As for the rest of your issues:
it appears that these parameters do exist but are not documented as of this point
a complete list of parameters available for the restoreaccount xml-api call follows:
'user' => $args->{'user'},
'restoretype' => $args->{'type'},
'restoreall' => $args->{'all'},
'restoreip' => $args->{'ip'},
'restoremail' => $args->{'mail'},
'restoremysql' => $args->{'mysql'},
'restoresubs' => $args->{'subs'},