the instructions are in the 6th post down, once you do the "make oldconfig" you'll see an option for kernel timer, select 1000hz and you're all set. you can optionally do "make menuconfig" and find it via the text menu but it's about 2 levels in. make oldconfig works just fine.
the only thing outdated about this is the kernel version, just substitute with the one you want and you're all set.
just go to: "Processor type and features" > "Timer frequency (XXXXX HZ)". The default HZ for 2.4 Kernels is 100. You can also change the HZ via the "USER_HZ" variable located in: include/asm-<arch>/param.h.
define USER_HZ 100 /* .. some user interfaces are in "ticks" */
post is outdated but the steps are the same for the new kernel, the only thing you have to change is the 2nd step "wget http://www.kernel.org....blah blah" to the kernel you want. so if you want the newest one you do:
"wget http://www.kernel.org/pub/linux/kern...-2.6.18.tar.gz " 3rd and 4th steps you need to change the numbers to whatever kernel you dl of course. 5th step you need to figure out what kernel you're on now so you can copy the config, do a "uname -r" and it will tell you what kernel you are on, substitute the correct numbers in the command. the rest just follow the instructions.