How to save as AI file with PDF compatability at the same location?

Hi Guys,

Requesting for script. Here are the details..

I  do have lot of AI files (from different paths) which are do not have PDF compatability switch  on. So now I am looking for script that all the files should save as at  the same place (over write) and should switch on the PDF compatability  switch on.

I tried with Action script, But the problem  is, action scripting is recording the path where I saved first time.  That means, all the files are save as into recorded path. This makes me  some what confusion, because source file will be 1 and save file with PDF  1. So in total 2 files will create which is not good.

So I am  requesting you that script schould overwirte at the same path and should  switch on the PDF compatability.

FYI: Using Adobe CS4...

If you help for this, it is really greatful for me.

Thanks in advance...

Regards

HARI