guys some 1 at the Warhammer community have modded the game so you will be able to play as orc and all the locked units.
follow those steps:
download the extractor and follow the readme stats...(to get VB just search google):
http://www.b5mods.com/tools/general/SpookyRATv200.rarnow do those step to unlock orcs\units:
add all the W40kData.sga by clicking the button the second from the right(the one with the many drivers.. its will extract all files into the folder "data" where the .sga was). afterward change the name from w40kdata.sga to any name (a must do!) like "abcd.backup" and start editing the the file with the notepad... follow this steps :
In the directory Data\attrib\racebps edit the file ork_race.lua (Windows editor will do fine) and change the line
GameData["race_details"]["playable"] = false
to true. You can do this to the other races to but there are no models for Eldar or Chaos and if you try to play the imps the game will crash instantly.
The Terminators:
In directory Data\attrib\spbs\races\space_marines open the file space_marine_squad_terminator.lua and delete the following lines:
GameData["squad_requirement_ext"]["requirement_table"]["required_2"] = Reference("required_ownership")
GameData["squad_requirement_ext"]["requirement_table"]["required_2"]["own_name"] = "relic_struct"
GameData["squad_requirement_ext"]["requirement_table"]["required_2"]["owned_count"] = 1.000
save and you get the terminators.
Same for Landraiders and Squiggoth.
for more info check the fourm:
http://forums.relicnews.com/showthread.php?t=36247&page=1&pp=15