If you have CS6 then you don't need another program to do what you want. :shake:
Open Adobe Bridge, browse for your folder with the RAW files in, click Ctrl+A to select all the files. Go to Tools > Photoshop > Image Processor. Click on Save in Same Location. (or any specific place you want to savei iin) Save as Jpeg, Quality to 12 (highest setting) and click Run.
Unless you are processing the RAW files, then by default they may not look as good as the Jpegs straight out of the camera, as the Jpegs will have had Picture Control setting applied, sharpening, contrast etc which non manufacturer software can not reproduce exactly. :shake:
So you could run the Nikon Capture software which came on the CD with your camera to do bulk conversions, (I think it can do bulk conversions) and also apply any camera setting that were set in the camera exactly. Whether you would see any difference to the Jpeg straight out of the camera is another thing. :shrug:
The power of RAW is that you can make changes and keep the quality, and enable more drastic changes with less degradation to the final image. You can save straight to a Tiff if you wanted maximum quality from the conversion process if you wanted too.
I think it would be hard to see the difference between a max quality Jpeg out of the camera and a RAW file saved at max quality in Nikon Capture with no changes made. :shrug:
An unprocessed RAW just saved at max quality in other RAW software may not look as good because it hasn't had the camera settings applied. RAW files tend to look a bit dull and flat because of that. Most RAW files need some processing in non manufacturer software. So you process the RAW file to get the best image you can. And every RAW file needs to be processed and saved as a Jpeg. But you don't normally need to process every file, just the good ones.
But if you do have a lot of images you want to convert into Jpegs, then if it is the same changes made to a load of images, then you can convert 10s, 100s, 1000s, of files in one go though.
I like to make my good pics the best they can be, so I don't need to bulk convert very often, as there is a not a huge number of good pics from each shoot.