You can also connect to the Integration Services Server via SSMS, right click on the package under 'Stored packages/MSDB' to locate your SSIS package. then right-click on it and select 'Export Package...' to save it as a file or even move it to another IS Server.
Ok Just clarify 100% before I do this.
I have connected to ssis from ssms and located the package as you mentioned above. So just to clarify, 'exporting' doesnt remove the package from this location - it is in effect just like copy and paste at a simple level - so the package actually stays on the server and performs as nothing has happened ??
Sorry for the hesitation on this, its just the first time i have done this.....:-)