How to get msdb.dbo.sp_dts_listpackages Stored Procedure?

From this prior thread it seems you're version of SSMS might need to be updated.

http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_26855579.html

Thank you. I have SQL Server 2008, my SSMS is 2005 and SSIS packages are created in Studio 2005. Unfortunately I have no TEST or Development Server so I am kind of reluctant to update SSMS to 2008 since I am sure that bizzare setting my predessor had for a reason. I am new for this company. What would you do in my case?

If the server is 2008 i would update my SSMS to 2008, however if you are not comfortable with that I might suggest installing SSMS 2008 on another machine you have terminal access to.

In extreme cases where I was working on someone elses machine for a time and didn't want to impact their system significantly with my own setup I have created a small Virtual Machine on my desktop (I have significant system privileges) and on that VM I installed software.  With that method I could simply power down the VM when it wasn't needed and remote to it from my physical desktop when I did.  That was a rather complicated situation though so take that approach with a grain of salt.