[PlanetCCRMA] recompiling kernel after adding a patch: newbie

[Duke Jonathan Jason]

hello,
I found the drivers for my modem,
but to make them work I have to apply a patch for the modem using the two commands:
#patch -p0 < usb-uhci.patch 
#patch -p0 < usb-ohci.patch 

I do this after having copied the patches in the /usr/source/linux-2.4.21.1-ll-acpi

I try to recompile the kernel in the way the majority of guides on internet suggest,
for making effective the changes these patches apply

make mrproper (if previous attempts made)

make oldconfig

make dep
make clean
make bzImage

make modules
make modules_install

but at the point of making bzImage, I get errors at the end, the cpu cannot find acpi.h, acpi_bus.h and some other file related to acpi, which I don't remember.....and a kernel image is not done

I saw this output searching on the archives of PlanetCCRMA, with 2 people or more having this result who posted questions, every email had no answer, but the one with an explanation near to this link
http://ccrma-www.stanford.edu/planetccrma/software/recompilekernel.html

so I probably instead going to /usr/src/redhat, but I don't know how to modify spec file to add my patch,
I tried to do 

cd /usr/src/redhat/SPECS
rpmbuild -ba kernel-2.4.21-1.ll.acpi.spec

but I get errors

so my answer is how to get out of this situation without quitting :)
who can help me how to recompile the kernel with the patch added in the correct way?

my system is redhat 9 with the planetCCRMA kernel 2.4.21-1.ll.acpi

Thanks in advance

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