[CentOS] reloading a new kernel

Hi - is it possible to load a SMP version of a kernel on a system running
a single CPU version of the kernel without a reboot?

For instance, a quad CPU system was accidentally booted as

    2.6.9-78.0.5.EL

but we need to load

    2.6.9-78.0.5.ELsmp

instead.

Any help would be appreciated.

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