If you are asking about the LANDESK Management Suite product, then you should be able to install your own "dev" environment in a VM or something. You will need the license credentials that are used, but there is no additional license costs for additional Core Servers. Licensing is limited by managed devices (or users), so just don't exceed your total allowed node count and you should be fine. For a small lab, you can just use a Windows 2012 R2 VM and the built in SQL Express.
If you need to integrate Service Desk, I'd recommend that you check with Service Desk specialists, as I'm not sure how it works for them or what steps might be needed.
Service Desk: Well - The privileges that need to be set for you to be able to administrate the Service Catalogue are :-
Configuration Components\Configuration\Service Catalogue
1) Service Catalogue Administrator – allows you to set the queries used in the lists in the Service Catalogue component
2) Service Catalogue Manager – Access to the Service Catalogue component
Maybe a new Analyst Role can be created call 'Catalogue Manager' with the above privileges associated - as well as yourself.
A shortcut group could then be created containing the catalogue components you need and published to the Role above.
You will need the Landesk Service Desk Console installed locally.
The above solution is simplistic and doesn't take into consideration any existing group/role membership - which may grant you the privileges to make changes. Changes that your LanDesk manager may not want you to have.
I hope this helps.