DOM problem: How to parse a string

Hey i am developing a distributed application in which servers pass on a request in XML format.....However this request is passed in the form of a string....I am using DOM to parse the xml. It is a fairly small string with like 7-9 lines of code. However the problem with DOM is that it allows me to parse the files not the strings......anyidea how to do that.....i cannot create temp files.....because there will be a huge number of requests so ..............or should i use another parse........if yes then tell me which is the easiest approach......i just wanna add or remove some tags at each server and then pass the request to the next

[648 byte] By [muneeb] at [2007-9-30 22:00:00]