Shell hacking: launch bash from csh

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http://stackoverflow.com – I am trying to set bash as my default shell in my university account. However, the traditional chsh approach does not work here because the university techs have disabled that as a startup shell. But, I can invoke bash by just calling bash from my terminal. So, I've developed a small hack that enables my current shell csh to start bash automatically by modifying my ~/.cshrc file so that it calls bash from it. The thing is, I wish to set it up in such way that when I exit my bash session, I want it to close it's parent csh session as well. How can I do that? (HowTos)