[ic] Disable 'smart' page routing?

[interchange-users@icdevgroup.org (marc.brevoort)]

Hello group,

In our company we have the need for a customized order tracking process. Most 
of the changes will be done on (a customized version of) order_status.html in 
the admin/ directory.

On this customized page, I've created a submit button with raw HTML:

<input type="submit" value="Update">

I've set mv_nextpage and the form action to the customized order_status.html,
but when I click my update button Interchange keeps routing me back to 
order.html.

How can I disable this 'smart' behaviour? I'd like to be in control of the 
software instead of the other way around.

Regards,

Marc Brevoort