replace strings in XML request

[Andrej van der Zee]

Hi,

Is the following sequence possible with JMeter:
1) Receive XML reply from server
2) Extract node from XML, let's say node X
3) Send another XML request in POST_DATA, but before sending it replacing
the session id in the XML by X from 2)

I saw that it is possible to send XML requests from a file, but can I also
do simple string-replacements before sending it to the server? How should I
do this?

Cheers,
Andrej