Larry
I just reread your original post and realized the you were looking for the user-defined expenses (thought at first you meant the extra deductions). As Nemanja suggests, the user-defined expenses are really costs to the employer which you would not normally report to your employee - these would be similar to the the employer's CCP, EI and WSIB expenses.
It is interesting though that Simply does generate the paychq7.csv file which contains the data that you are looking for. (the paychq*.csv files are used by Crystal Reports) Unfortunately, the fields are not seperated properly to allow useage of the data in a customized payroll cheque.
Brent