Linuxcnc 2.6 is available as an .iso image for burning to DVD or installing to a USB drive
It can be downloaded from here Debian Wheezy ISO
Read the developers release notes and recommended download procedure hereDebian Wheezy ISO Release Notes
Instructions for burning to DVD are here, just substitute DVD for CD, as the image is toolarge for a cd (1.1GB) Burning ISO
Instructions for writing a bootable USB stick image, under windows and Linux, are here http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Hybrid_Iso