Integrating CMMI and Scrum

I'm going to do a project off-shore (will be onshore when i go :)). The delivery center is CMMI level 5 (of course).
That gives me a interesting challenge. I have to integrate the delivery center CMMI process' into Scrum (or the other way around).
That means that not only should i master scrum but also the delivery centers implementation of CMMI.
Joseph Pelrine and others says that Scrum is CMM level 3, that is there is a description (level 2) and the process is characterised (for the organisation) and proactive.
What i miss is then :)
Level 4: defined "enough" measure so that we can measure and control (are the burndowns and backlogs enough?) and to reach
Level 5 we just need to define continuous process improvements.
As i see it - the existing process just have to include Scrum and then we'll use the existing process' for reaching 4 and 5.
If any of you have some thoughts on this one I would appriciate them.
I'll keep this post updated as i get wiser.
Just found a interesting blog entry on cmmi.
It will be interessting to see the process they're using.