I am attempting to delete some files from my target installation folder prior
to new versions of the files being copied over during the installation.  In
an effort to implement this functionality I created a custom installer class
that I've added to my solution.  I would like specific actions in this custom
installer class to run before files are copied to the target installation
folders.

I have performed the following steps:
1)  Overridden the install method in the custom installer class
2)  Within the overridden install method I call another method to perform my
specific action (delete older versions of a file).  This call happens before
the call to MyBase.Install.
3)  I have added my custom install dll as a custom action to the "Install"
custom action folder.  

The problem is that my delete file method gets called after the new files
have been copied to the target installation directory.

I then attempted to add a BeforeInstall event to the custom installer class
that would call my delete files method in an effort to grab control before
the base install event is processed.  Unfortunately this event did not get
fired until after the new files were copied to the target installation folder.

I have two questions:
1) Is it possible to get control via a custom installer class (or another
methodology) prior to the new files being copied over?

2) Shouldn't the before install event that handles MyBase.BeforeInstall be
called prior to files being copied (or other install actions)?

Thank You in advance,

Regards,
Keith D.