This should help:
when you find the file "AdobeHunspellPlugin.bundle", copy it to your desktop, change the extension to .zip and extract the contents. The Russian dictionary should be in the ru_RU folder (ru_RU.dic)
Thanks Luke, but I'm not able to catch-up this file 'AdobeHunspellPlugin.bundle' in my system from the installation folders of CS5.5 and CS6, could you advise how to get this file?
I can find this folder and inside that ru_RU.dic file, could you please confirm where I can get the file hyph_ru_RU.dic, in case if I'm adding the new dictionary?