[avatar_of_Moock]

вообще 10, но я тут отыскал:

Flex can't write to a local file. You should send this xml string to a php application for example, and have it write the file for you. You could also retrieve the file name from php and show a download box so the user can save a copy of it.
Below is an example of sending the xmlstring to server side script. it could be php, coldfusion, jsp, asp or anything.

ясно в общем