Not the best idea. FYI: neither the CentOS or the Fedora kernels are vanilla anyhow.
Better idea get the latest released 126.96.36.199 vanilla kernel source from kernel.org;
After extraction do in order;
make oldconfig (this will get you close to what you want)
make menuconfig (or xconfig or gconfig here, so you make your tweaks)
It would be a good idea to know in advance what hardware you actually have when configuring the kernel. You may be able to run the Fedora 8 kernel to assist in creating the starting configuration point (make oldconfig).