What is the recommended way to upgrade from grub-legacy to grub2

[Hendrik Boom <hendrik@topoi.pooq.com>]

When I search for ways to upgrade, all I find it people having trouble 
with grub2.

I can't find the recommended upgrade path.

I have a laptop that boots squeeze using grub-legacy.  The squeeze 
release notes tell me that during upgrade from lenny I had the option to 
chain-load grub2 from grub.  That seems like a safe way to go.

Now I never actually did this upgrade, just kept updating testing every 
few weeks, until testing got to be squeeze.  What do I do now to do this 
upgrade, and get this safe chain-load option?  Just install grub2 using 
aptitude?  Or does the lenny->squeeze upgrade do something sneakier?

-- hendrik

PS. My laptop now dual-boots Windows XP and Debian squeeze.  I plan to 
have it triple-boot Windows XP, squeeze, and testing sometime in the 
future, but I think I'd better get the bootloading sorted out first.