Some XML parser /String handling --Which is better?

[Sunitha Mudidani]

Hi
I have an application where we get an xml msg which is transformed using xslt. The transformed xml is actuallly a set of messages which needs to be tokenized and published onto jms individually.
Before publishing we need to actually modify the message -- Remove one xml tag and add one xml tag at a specified location
These changes cannot be done in the xslt as the tag values are either required /available in the application only.

we are presently handling it using string methods.
Is it efficient to use to an xml parser or the present one will be better?

Pls suggest. Thanks