The other option is to create AD groups for each SW package. If you then link that group through a LDAP query in LANDesk to a policy based SW delivery task then all your staff have to do is change the group memberships and dont even need acces to the LANDesk console.
You do need to use a policy based delivery for this as LANDesk updates the LDAP query every hour by default for policy only. It is then also determined by the clients policy run schedule to when the SW would be deployed on their system.