I've (nearly) finished writing my thesis, using natbib and the author-year style for references and my own bst file (generated using custom bib). I was using the 'sort' option for natbib, which sorted multiple references in alphabetical order (the same as the bibliography) when using, for example, \citep{smith:92, blogs:95, dent:94} as follows:
... (Blogs et al, 1995; Dent et al, 1994; Smith et al, 1992).
I was happy with this, but my supervisor wants them in chronological rather than alphabetical order (without changing the order of the bibliography!) as follows:
... (Smith et al, 1992; Dent et al, 1994; Blogs et al, 1995).
I can obviously do this by removing the 'sort' flag to natbib and re-ordering all my references manually, but this seems somewhat laborious

Thanks in advance!
Matt