Populating new XML into existing DCR

System

Hello,

I have read quite a bit of documentation and have spent quite a bit of time with the experimentation. I'm wondering how to do the following...

Using (preferably) TeamSite::XMLnode or XMLparser, how can I (a) change a value in an existing DCR and (b) insert a new node/value in an existing DCR. Can this be done??

Thanks in advance!

Dave