FYI, if you already have installed 9.1.2.218 in a distributed environment you should apply the patch at the link below instead of running the new DSA installer mentioned above.
ftp://ftp.ca.com/pub/netqos/product_patches/NFA/9.1.2/DSALoader_IP.zip
If you are installing 9.1.2 fresh in a 3 tier environment or upgrading a distributed 3 tier environment from RA 9.0.161 then you should go ahead and use the new DSA installer from the support.ca.com download center mentioned by James in the last post.
CA Network Flow Analysis DSA r9.1 SP2 - Setup (EN, JP, SCH, FR)
DVD05163411M.iso