>So, regardless of how I do this, each PC will require the
> .Net framework installed??
Yes.

> But that's pretty big
Yes. About 20MB. Plus the inconvenience of the SP1.

> I was of the understanding that you could just
> package your app with the relevant classes from
> the framework, that are required, maybe I'm wrong.
I hadn't heard this before. Let me know if this is indeed an option.

If you are interested on the third option that I mentioned, I have a sample on my web site on how to distribute applications using "zero touch deployment." The code and slides are there, but not a detailed whitepaper. Still working on it...

http://hcorrea.no-ip.com/DotWiki/default.aspx?topic=AutoDeployingWinFormsDotNetApplications