How to override taxonomy/term without loosing functionality of taxonomy module

I would like my views override of taxonomy/term to do following:
* when you enter /taxonomy/term/[tid] path shows teasers as usual (that's easy)
* have feed selector with path /taxonomy/term/[tid]/0/feed for pathauto aliases to work (I could not make it. My best was /taxonomy/term/[tid]/*/feed)
* when you enter /taxonomy/term/[tid]/[depth] gives you the same result as taxonomy module (I was trying different things in Argument Handling Code but without success).

How can I get such an effect?