WP-e-Commerce With WPMU?

I REALLY want to use WP-e-Commerce for my blog AND my user's
blogs. I have installed the plug-in and it works for the main blog and
shows up for the user blogs, but does not allow some of the settings
to work. Like the default country settings, etc. Any idea of how I can
get this to work properly? Perhaps you have a copy that has been
modified that I can use. This is a major feature I really want to

So, if anyone has used wp-e-commerce, then please let me know.

I know someone has to have set-it up. It is such a nice tool and with WPMU, it would be even better...

Thanks so much.