Setting up Temporary Salaried Employees

Can anyone recommend some ways to set up temporary salaried employees with no benefits in E1? 

 If I set up a temporary employee with a pay class of 'S' then some of our company level dba's that calculate for salaried employees will calculate for the temps, which is not what I want to occur.

We do not want these employee's to have any benefits.  I created a TEMP benefit group with no benefit categories in the group but the system still allowed me to enroll the temp employee in a medical plan.  Is there a way to prevent this?  Is there a benefit status perhaps that I should assign?