Payroll module for Sentrifugo

Need a generic Payroll Module for Sentrifugo application. Should be able to create addition fields like HRA CAR ALLOWANCES etc etc(n number of fields) and deductions (n number of fields) .Once created, these fields will appear in employee master where we define the HRA and other allowances values. Should be able to add Overtime and Holiday Overtime fileds and the values are added at the time of processing the [login to view URL] be able to deduct leaves if taken any for the particular month. Also there may be commision or bonus which will be added one time for a particular month, which will entered during payroll processing. One the payroll tab is clicked. (Option to click 30 days or actual month days like 30 or 31) Set the payroll Month. Eg June or July Load the details which will load the employees in row wise grid showing all the data ( whatever is defined in employee details and blank rows for commission or bonus , OT ,HOT etc Save the payroll Once saved, a payslip is generated and a paysheet is generated (which can be converted to pdf and excel) For the next month there should be an option to load the previous month payroll which will be then edited by the user and processed.