Can I upgrade IIS 6.0 running wss 3.0 to IIS 7.x

I'm running Sharepoint wss 3.0 on a WinServer 2008 running IIS 6. I'm also running an ftp server with II6.

I'm considering upgrading to IIS 7.x to take advantage of FTPS capabilities.

So, a couple of questions.

Is there an upgrade path from 6 to 7 or is it a new install that would require reconfiguring the FTP sites?

More importantly, how would moving from IIS 6 to IIS 7 affect my wss 3.0 install? Would it break it? Require re-installing wss3.0?

Thanks for your thoughts. Depending on your responses, I may move the FTP service to another server and start from scratch.

Gratefully, BadAssBass