Repeating Process Chain

Hi,

What do I need to do to Re-Schedule the Process of the Process Chain, if it fails and I had rectifieid the error ,but It does not have Repeat Menu on its Context Menu ?

Should I go to its Infopackage and Select the Start there ?

Can Any One Please Help How to Restart this process?

Does any one know about the Transaction code to create Background Jobs ?

Ashish