Rar and Zip issues

I have a whole bunch of files stored in a RAR, inside that rar is a bunch of folders that all have a single ZIP archive, and in the zip is another RAR, and inside that RAR is the files I need, I have no clue who came up with the brilliant idea to set it up that way, but if I find out I'm gonna smack the crap out of them. Anyway, is there a file that will drill down to that final rar for me without a bunch of hassle? or even better if I could just feed the main RAR in and have it spit out all the files. Anything that can help me with this?