InfoPath Dev

For forms published directly to a library, I've been using a link similar to this:  http://<site collection>/<form library>/Forms/template.xsn?OpenIn=browser&Source=http://<site collection>/Pages/SubmittedRedirect.aspx.  The &Source= directs the page to the aspx close page I created without dumping the user into the library.

However, when using site content types on a library instead of a directly published form, the above URL doesn't work.  How can I construct a URL I can post in a friendly link that will redirect to my closed page instead of right back to the library?

For those interested, here's how I got content types to work.

http://<site>/<site collection>/_layouts/FormServer.aspx?XsnLocation=http://<site>/<ContentTypeFolder>/<ContentType>.xsn?DefaultItemOpen=1&Source=http://<site>/<redirectPage>

In my case the redirect page was an aspx page.