create symlinks in /lib/modules/4.2.9/
tar xvf linux-4.2.9-patched.txz
cd linux-4.2.9
ln -sf "location of linux-4.2.9" to /usr/src/linux
ln -sf /usr/src/linux /lib/modules/4.2.9-tinycore/build 
ln -sf /usr/src/linux /lib/modules/4.2.9-tinycore/source 
# Fix for older VBox versions-
ln -s /usr/src/linux/include/generated/uapi/linux/version.h \
/usr/src/linux/include/linux/

cp../config-4.2.9-tinycore-mountdevtmpfs linux-4.2.9/.config
cd /usr/src/linux
make oldconfig
make prepare
make modules_prepare

Run the virtualbox*.run file

Then download the Guest additions ISO.  Run the VBoxLinuxAdditions.run
file in it to build the Guest additions modules.

make oldconfig && make prepare for each run.