What is the problem specifically? CS2 certainly works fine with the D70 raw.
If when you launch a d70 file in bridge, the Nikon Raw converter launches not the Adobe one.
If so, remove the Nikon raw converter (a plugin) from CS2 (or lead the file name with a ~ (tilde). If you install any nikon app it automatically installs the Nikon Raw converter in Photoshop. Easy to disarm.