GRUB and the last FC4 kernel

[Hoffmann]

Hi All:

I have updating to the last FC4 kernel. However, after
that, I realized that the not only the previous FC4
kernel, but also, the last one are present on GRUP. I
meanm during the booting process, I see the following
on GRUB:

(a) The last FC4 kernel;
(b) The previous FC4 kernel;
(c) Windows xp;
(d) Other.

How could I remove the previous FC4 kernel from GRUB,
so? Is it safe to do that? 
Thanks!
Hoffmann

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