There are 2 places where you'll find kernel headers: in /usr/include/linux and /usr/src/linux
/usr/include/linux should contain the headers of the default Ubuntu kernel. They were used to build the glibc package. Since most core software links against glibc, it needs the correct headers to compile.
/usr/src/linux will contain the headers of your custom kernel and 3rd-party kernel modules (vboxdrv, madwifi, etc) will use them to build.
I don't use openbox on mint.. I like my Gnome/metacity there but I felt I had to try your kernel tweaking guide. ^^ works like a charm!! I've compiled two different kernel versions on my irc/bot box (which runs Mint 5). <edit>my laptop too</edit> very handy!!
thanks and cheers,
Last edited by deadguy on Mon Oct 19, 2009 1:49 am, edited 1 time in total.