This add-on is an addition to the Crew Transfer Vehicle add-on - CTV-02-A-v 0.96, which must be installed prior to this.
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Please read the included documentation 'Cargo Transfer Vehicles v0.95' in the 'Add-on Docs folder' for further details. It lists all the other add-ons that are essential for some of the scenarios to work, which are Francis Drakes CEVs and his 'MEM' and 'Ares' Mars Landers.