What do you do when you have two different kernels?
 

I have two questions:

I have a Dell Vostro 1000 with a 120GB HDD, which I partitioned into 3 drives.

I installed Fedora 14 from the DVD that came with the Bible, on the 3d drive which is 39GB which is broken down into two volumes, 524MB ext4 mounted at /boot and the other is 38GB LVM2 Physical Volume which has a "Green VG" icon on it, is this right.

Things just didn't seem to be working correctly, my internet provider which is Clear doesn't have the drivers for Linux. So I went to DeVry and did a update, now I have two different kernels
Fedora (2.6.35.12-88.fc14.i686) the other is
Fedora (2.6.35.6-45.fc14.i686)
Do I keep both kernels or delete one, and if I should delete one which one and how?

If you see both in your boot menu and can select either and they function, then you just decide which one you want. The kernel isn't that big, I don't have Fedora but on my machine the vmlinuz kernel file is 2MB. If you don't want both entries in the menu, you can comment one out by putting hash marks to the left in the grub.conf file.

I'd certainly advise testing each to make sure they work on everything!

Personally, I don't bother with deleting old kernels. The only reason I can see for doing so is HDD space, which in today's world is a non-issue. Your system normally defaults to the newest version when booting, and as long as everything still works correctly, there's nothing to be concerned about.