Can you run DTS packages in SQL 2005?
In most cases the answer would be yes. There are a few incompatibilities but you can detect these by running the Upgrade advisor utility.
How to execute "old" DTS packages? You can either start them from a SSIS packager by using the "Execute DTS 2000 Package task" or using dtsexec.exe which replaced dstrun.exe
Personnally I prefer to transfer any old packages to SSIS. In SSMS there's a Migration Wizard which makes the initial migration really easy. Just Look under Mangement>Legacy>DTS PAckages.
[font="Verdana"]Markus Bohse[/font]