Contractor rates on Time Slip by Project Summary

Please make it possible to enter the rate for a contractor in the Vendor information so that it can be used to produce the cost for a contractor on a project using the Time Slip by Project Summary report.  Right now we have to set up a contractor as a vendor to pay them and track their hours using time slips to know what hours they have on a project.  You have a window to select a contractor or Employee but the Contractor selection does not link to a rate payable to the Contractor.  If you link it to a Vendor with Contractor selected with their rate it would be much easier and we would not have to get them mixed up with our payroll as they would be paid by invoice.