Question about Media Direct booting and button.

I have a Vostro 1500 and I'm wondering if my Media Direct button is something I should be concerned about, considering all the posts I've seen about how to can alter the MBR information.

What I should make clear is that I've had this laptop since early 2008. Early on I installed a fresh copy of XP Pro and about a year after I bought a new hard drive (750 GB) to replace the stock 120, which my laptop has been running ever since. When I first got the 750 GB drive I placed it into a USB enclosure and then cloned my XP partition onto it, which worked like a charm.

The original drive had some hidden partitions that as I understand it contain hidden boot code to help facilitate the Media Direct booting process (when the "house" button is pressed when the computer is off.)

What I am wondering is since the 750 GB drive currently in the laptop lacks those hidden partitions, but instead has one big one spanning the entire drive ( which required me to edit the boot.ini once the cloning was complete since the Windows partition was now the first one on the drive) does this mean that the button is rendered effectively inert?

Or would pressing it when powered off still load something from the BIOS or elsewhere? If the latter is true, should I run

Code:

rmbr 1 1

(or is it

Code:

rmbr DELL 1 1

? Different sources seem to be giving differing info on that) ? Also, is it safe to run this program from within Windows?

I should probably also mention that I've never attempted to install the Media Direct software ever since installing XP clean back when I first got the laptop.

I just to prevent any potential accidents from pressing that (albeit I haven't ever had an issue being careful since 2008 )

Thanks for any advise.