Change Alpha channel on multiple ecw tiles

Hi All,

Trying to save myself hours of work here, I have a layer with >300 ecw tiles from aerial photography all of which need the alpha channel updated to be band 4.

Is there a way to achieve this using python, if so what functions should I be looking at to change these attributes.

I have not done anything in python but have experience in vb.net and SQL. So am hoping to add python to my bag of tricks.

Any code examples or hints will be greatly appreciated.

Cheers

Scott