GENTOO:
1)create directory <OVERLAY_DIR>/sys-kernel/nitro-sources (substitute <OVERLAY_DIR> according to overlay path)
2) PROMPT>cd <OVERLAY_DIR>/sys-kernel/nitro-sources
3) PROMPT>wget http://www.stud.uni-karlsruhe.de/~uyavl/public/nitro-sources/2.6.15-nitro3/nitro-sources-2.6.15-r3.ebuild
4) PROMPT>ebuild nitro-sources-2.6.15-r3.ebuild digest
5) PROMPT>USE="symlink" emerge nitro-sources
6) PROMPT>cd /usr/src/linux
7) configure, compile and install your kernel
if in doubt about how to do it, consult the documentation in the kernel source directory

ALL OTHER DISTROS:
1) PROMPT>cd /usr/src
2) PROMPT>wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.15.tar.bz2
3) PROMPT>wget http://www.stud.uni-karlsruhe.de/~uyavl/public/nitro-sources/2.6.15-nitro3/patch-2.6.15-nitro3.bz2
4) PROMPT>tar -xvjf linux-2.6.15.tar.bz2 && rm linux-2.6.15.tar.bz2
5) PROMPT>mv linux-2.6.15 linux-2.6.15-nitro3 && rm linux && ln -s linux-2.6.15-nitro3 linux
6) PROMPT>bunzip2 patch-2.6.15-nitro3.bz2 && cd linux
7) PROMPT>patch -p1 -i ../patch-2.6.15-nitro3
  configure, compile and install your kernel
if in doubt about how to do it, consult the documentation in the kernel source directory

NOTE:
for rpm based distros, try doing "make rpm" after menuconfig, although this is untested

 

http://forums.gentoo.org/viewtopic-t-434049-highlight-nitro.html