additional gcode functionality in emc (bdi 4.3)

I just installed bdi 4.3 from http://www.linuxcnc.org I have been
running it for a few days now. One issue I have that NIST RS274 does
not have conditional statements. (like IF and loops). I asked about
it on the emc irc channel and someone gave me a link to

http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl/emcinfo.pl?
AdditionalGCodeFunctionality

It seems to have everything that I would want. It also has fixes for
g92 that I have run into already only using it for a few days. Now I
am not a linux person - not even close. I am looking on sourceforge
site for the files I would need to install this new interpeter. I am
coming up with nothing.

Is this available? Where do I get it? How to I then integrate it
into my current emc install?

thanks for your help
sam