Paying A Set Rate To Affiliates?

Is there a way to simply pay affiliates a set amount per free sign up? Rather than a percentage? My site is free to join and you can't pay a percentage of 0. I would like to offer a set rate. like $0.25 $0.50 or  $1.00. Something like that.

in aff/finance.php we have this:

$percent = (float)$aff_arr['Percent'] / 100.0;
$tr = array();
$tr_query = "";
$order_num_disabled = 'disabled="disabled"';
$last_disabled = 'disabled="disabled"';
$date_disabled = 'disabled="disabled"';
$between_disabled = 'disabled="disabled"';

Now, if we can change this from a $percent = (float)$aff_arr)['Percent']/100.0;

Then we should be able to set it to figure using a non-percent method.  Simply need to find a way to bring this around so that it kills the % and $ and instead uses a $ times # formula.  I'll dig around and see what I can find on it.

Thank you for your answer and your help.

Is there an update about this feature to pay out  instead of the percentage?

THX

Just a question of my own here, but in aff/finance.php we have this:

$percent = (float)$aff_arr['Percent'] / 100.0;

If I change it to:

$percent = (float)$aff_arr['25'] / 100.0;

Will this set my default affiliate percent value to 25%?