Trying to do make in /usr/local/modules:

knoppix@CyberSpace:/usr/local/em8300/modules$ make
cat: /lib/modules//lib/modules/2.4.20pre/build/include/linux/autoconf.h: No such file or directory
cat: /lib/modules//lib/modules/2.4.20pre/build/include/linux/version.h: No such file or directory
cc -D__KERNEL__ -DMODULE -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -g -I ../include -I /lib/modules//lib/modules/2.4.20pre/build/include/ -O2 -fomit-frame-pointer -Wall -DEM8300_VIDEOMODE_DEFAULT=EM8300_VIDEOMODE_NTSC -DEM8300_AUDIOMODE_DEFAULT=EM8300_AUDIOMODE_ANALOG -DEM8300_VERSION=\""0.13.0"\" -DCONFIG_ADV717X_PIXELPORT16BIT -DCONFIG_ADV717X_PIXELPORTPAL -DCONFIG_EM8300_DICOMPAL -DCONFIG_EM8300_DICOMFIX -DCONFIG_EM8300_DICOMCTRL -c -o em8300_main.o em8300_main.c
em8300_main.c:77:2: #error "This needs the I2C Bit Banging Interface in your Kernel"
make: *** [em8300_main.o] Error 1
knoppix@CyberSpace:/usr/local/em8300/modules$

I installed an second Kernel and installed patchs knoppix +
ptrace. Did not patch xfs to this kernel. System runs good.
I thought kernel-headers were produced when compiling an Kernel.

/lib/modules/2.4.20

New at this, do I need to download kernel-headers for
2.4.20, also on internet they have like 2.4.20-3 / -9 / etc.
How do I get the right one?

Also I recompiled the 2.4.20 Kernel with I2C devices built
into the kernel (instead of modules) - I though this was the
problem.

Any HELP greatly appreciated - I want to use my
Hollywood+ DVD-DECODER card to watch DVD's.
(Better Quality then the software decorders)

Thanks ...