This Procedure is what I use to clean out all the old DTS package version on my server periodically. You just place it in the msdb database and run it as you need to.
Note: Although I have never had an issue with it, I do suggest backup msdb database beforehand, just in case you wack a version and realize later you didn't want to do it.
Like the one posted before, the use of the SP is like this: proc_alerts 1,18. This will show the first 18 alerts on the system. OR proc_alerts 20,35 will show from 20 to 35. This lets you manage the list without letting go out of the screen.