another auto increment

why to do that
i'm sure there is another solution

i just need a field that adds 1 to the current integer.... auto increment does that perfectly, but it only allows 1?

The other solution would be to calculate the value using the auto incremented value i.e if your value started at 5 and the id was 7 instead of starting a count wasting db space just get the id and 5.

$new_num = $row + 5;

You can not have more than one auto-increment column in the same table in MySQL.

You could however do something like:

/*
  Table
  +-----------+------------+
  | RowId (AI)| RowCount   |
  +-----------+------------+
  | 1         | 37         |
  +-----------+------------+
  | 2         | 51         |
  +-----------+------------+
  | 3         | 26         |
  +-----------+------------+
*/

UPDATE Table SET RowCount = RowCount + 1 WHERE RowId = 1

That query would increment your rowcount by 1 each run.