Not all these patches have been tested together. It's harder than you think. 
We will be hopefully shipping more unified patches soon. 
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For 440BX users: 
irq_route.diff is Tyson Sawyer's patch to properly handle LINUXBIOS kernels.
It has been tested on 2.4.0-test6 kernels. 
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For SiS630 users: Use the linux-2.4.0-test12-sis630-sisfb_lite.patch ONLY.
There is also a sameple kernel configuration file config-2.4.0-test12.sis.
This will build a kernel that works with LinuxBIOS. 
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For IDE spinup patch you can use the ide-spinup.patch. This will ONLY add 
a patch to force IDE controllers on, and wait for hda to spin up