Grub problems Lucid 10.04

[Joep L. Blom]

I hope (Goh Lip?) can help me out with the following problem.
I have upgraded from 8.04 to 10.04 and done nothing to grub as it simply 
scares me.
I have no problems with starting Ubuntu whatsoever. However, since 
November are the updated kernels not implemented in grub.
Apparently grub still uses menu.lst in the /boot/grub directory and that 
file is not updated - as it did earlier - with the latest loaded kernel 
version.
With the automatic updates the kernel files are updated and I the latest 
is version 2.6.32-32-generic but grub loads only 2.36.32-26-generic.
As I know that I should use grub-2 instead of grub legacy that I 
apparently use, pleas can somebody guide me how I can correct this and 
why not automatically the newest kernel is added to menu.lst. I assume I 
have to start using grub-2 but I'm very wary as this system is my 
production system and I cannot loose days before I can trust grub again.
Hope somebody can help out.
Joep