How do i Edit the Package Source file name Dynamically

Hi

I have created a package using DTS Designer to import the data from flat file to the SQL server.
i have sheduled the package to execute at every 1st day of the month and saved the the package to the local server.

i want to do the following steps dynamically from the Visual Basic

1. i am loading all the packages from the local server and also from the metadata services into a combo box. select one package from the combo box and i want to change the package shedule time from vb and i want to save the package back to the sql server.

2. when the package is executing at the schedule time at that time i want to change the source of the package that means flat filename(to different filename) and i need to execute the package and save the package.

how do i do this dynamically.

Thanks in advance

Regards
GandhiThe package schedule time is really a job schedule time - so you would use the sp_update_jobschedule stored procedure. For the 2nd part, when would the filename change and what would change it ?