Season & Episode rename

Hi All

Trying to think my way through this. I have many directories all with SXX where XX is an increment number. I want the episodes in those directories to be numbered incrementally ad with the XX part in the file name. Obvs I also need the increment to restart when directory is changed. Cant seem to think my way through this atm. Any ideas?

Currently I do three 'Replace'

Text to be replaced: ^\d.
Replace with:<DirName>__

Text to be replaced: ^\d\d.
Replace with:<DirName>__

Text to be replaced: (S\d\d*) (.*)__(.*)
Replace with:\1E<Inc Nr:1> \3

That still leaves me with the problem of resetting that inc nr when the directory changes...

The answer should be obvious!
<Inc NrDir>