I think when you install the game, the computer cannot load mocow map or other because disk damage . But you can continue the install when you selcet "ignore".
After completly install you can load manuelly all the maps you want.
You can found the map on this site in download section.
Download map, unzip the folder and extract on "Program Files\Microsofts Games\CC3\maps"
In August of 2004, Zappi, Homba, Bambam887, RedScorpion and MOOXE all pitched
in to create this Close Combat site. I would to thank all the people who have visited
and found this site to thier liking. I hope you had time to check out some
of the great Close Combat mods and our forums. I'd also like to thank
all the members of our volunteer staff that have helped over
the years, and all our users that contributed to this site!