LITs Include user name of who posted and also letters US in front of user name

Hello Gurus...

I hope you are able to help me with this modification, I'm processing some LITs pre-posts docs and once that's taken place, I will get some output lines in the INBOX and under the TITLE I will normally get something like "FM Budget LIT 30000xxxxx preposted by USxxxxxx" lines and what I want to do is remove the US from the front of the user name so I can easily sort them or group them. Most likely this will be taking place in BUS0050 and the Workflow we're looking at is the 900000012.

I need to know the steps to modify this Object BUS0050or other program and be able to print it.

Thank you for your help.

JZ