Rainbow Six: Raven Shield 1.51 patch
The 1.51 patch changes include: added Operative SDK; CD keys stored
in the Registy are now encrypted; enhanced support for Athena Sword
and future mission packs; some problems related to the 'Immediate
Firing Animations' option have been fixed; and Raven Shield codes
have been modified so that it won't time out as easily when waiting
for CD key authorisation.