Question about dual boot setup

Hello,

I was helping a friend get setup with 2 Win XP Pro SP2 installations, each on a separate hard drive on his computer. With previous dual boots I've gotten a menu to select the OS to load, but that did not happen. What's the simplest way to fix this, preferably not involving manually editing the Boot.ini file? I may have to do this over the phone. I did some Googling, but the apps I found were too complex.

As an alternative, I was hoping there's a way to he can push a key before Windows loads to choose the "First Boot Device" in the BIOS without having to go through all the steps of editing the BIOS. On my ASUS p5B, I push F8 to choose the boot device, but F8 does not work on my friends ECS (Northwood P4 era) motherboard. Are the other keys that might do the trick?

Any help would be greatly appreciated!

I didn't remove the original installation drive, but I did switch it from Master to Slave on the IDE cable before doing the second installation.

I don't think the IDE cables were long enough to go between the CD drives at the top and the hard drives in the middle. But the slaved windows drive (the old installation) seems to be running as well as it was before (which isn't saying much) . Regardless, I just need an easy way to offer boot options on startup. I used something called BCD (I think) on Vista to easily setup options on my system, but it doesn't work with only XP.

Yes, they're both there. The workaround we're using at the moment is to go into the BIOS and change the "First Boot Device", save and exit. Not ideal obviously.

IIRC, only one OS was listed in each boot.ini.