How to override WebRequest

[vatawna]

I need to override WebRequest to create a custom class to upload files using ftp protocol, since I have VS .Net 2003 and it doesn't support framework 2.0 which provides FtpWebRequest class. Does anyone have any idea how to do this? There's a link on microsoft website to create a pluggable ftp protocol (

http://support.microsoft.com/kb/812409),

but it's so vague and I can't make my code work.

Thanks.