If you're talking about copy a set of files to the C: drive like to install them, why not try a setup utility like Inno Setup? This is what setup tools were designed to do.

Inno Setup (FREE)
http://www.jrsoftware.org/isinfo.php

You can bundle all the files you want to copy to the C: drive in the setup and let the installer do all the work of copying the files.

The installer can let the user choose the destination or you can fix it. The setup procedure can be as interactive or automated as you want.

You can use an EXE created by Inno with Flash 5 or Flash MX without any problems. No NEED to move to a special purpose third party tool to solve this one.