[Serusers] Change INVITE and Replace

Hello all, I need help about this: When an INVITE packet is received by SER, a Perl script changes the SDP of this INVITE and the result of this script (new INVITE with new SDP) is saved in a txt file. My question is: How can I do that SER sends the new INVITE, which is in a txt file. I have tried to do this with REPLACE command but I think is not possible because It doesn`t accept "regular expression" as substitute and I don´t know how save this new SDP in variables which can be process by SER. Please help me. Thank you very much. _________________________________________________________________ Consigue el nuevo Windows Live Messenger http://get.live.com/messenger/overview