Meetme in * 1.4

Hi all, I need that my conference users don’t continue in dialplan when kicked out. I see that in 1.6 is by default and with the C option you can enable it. How can I have this feature on Asterisk 1.4? Is a porting of app_meetme.c (1.6) on Asterisk 1.4 possible?
Any workaround is also appreciated…