this project is still being worked on so more mission will come later.
and yeah there are new units the info about them are in the mission intel.
here is some info of 2 version of the game that works with this mission pack\Mod pack
Gruntmods: https://gruntmods.com/dune_2000_gruntmods_edition/
DuneMaster: https://dunemaster.webs.com/files