In some instances that would be good but in this case I want it installed to the hard drive, not a flash drive. I just wondered if I installed it to a hard drive that's a completely separate hard drive from the drive that contains the mbr would I need to boot it from a flash drive.
Well if the drive was a USB drive the procedure would be basically
the same. A USB flash or a USB external HD are basically the
same install procedure. You can't have 2 HD's inside a laptop, so,
I don't know how that would happen.
If you installed PCL in your other laptop that's a normal install with PCL
being the only OS there. Interchanging drives should boot
normally then. I use xfs for flash drives, works better, but to the
other HD ext4 is normally used in the install process.
I could put my USB external in my netbook and it would boot. I could
put a HD from another computer in my netbook and it would boot,
both from the menu.lst in each, which would be called up by grub by
the /dev/sda MBR which is installed in each separate HD, one HD
for each laptop. Each with it's own MBR waiting to boot in the laptop
the HD is installed in.
If not clear ask a question, of course. This is grub legacy which is
not grub2, which is a more system-wide auto configuration that is done.
Grub legacy is nice for in individual partitions while grub2 configures
everything at once, which isn't always what is wanted in some cases.
PCL uses grub legacy.