As far as I can see there are three main ways of getting to the Package Migration Wizard.
On my PC I navigated to E:\Program Files\Microsoft SQL Server\90\DTS\Binn and located the executable DTSMigrationWizard.exe
In an SSIS project right click on the SSIS Packages folder and click on Migrate DTS 2000 Package
In SSMS expand the Database Server, expand the Management folder and finally expand the Legacy folder. You should now see a folder called Data transformation Services and if you right click on that you can access the migration wizard from there.
add a one or paragraph summary or description of what's discussed here; put yours after 'Summary:'