hi

Howto start an already installed Debian Lenny using setup CD/DVD, for example if GRUB won't to start it?

Gparted live and hiren's bootcd both have the option to boot local os.

Can you pls give some more details how it works using Gparted Live?

At boot screen it says
LOCAL OPERATING SYSTEM IF AVAILABLE
select that option.

Thx, but I have 3 OS installed: XP, Lenny and freeBSD and the default is WIN XP.

When you select it doesn give options of other os'es

If I choose "LOCAL OPERATING SYSTEM IF AVAILABLE" at the startup, then nothing happens, just goes back to the boot menu from Gparted.

BTW I have 2 HDD's: 1 with XP and a second with Lenny and freeBSD.

If GRUB loads but fails to continue - what error message does it receive?

After my initial install, I had to adjust one of the (0,0) to (2,0).
(My debian is on /dev/sdb* or /dev/sdc* - depending on what system I boot with.)

When I booted, and grub appeared - I was able to select the entry in the grub menu, and edit it (`e`, I believe), then boot using the tweak. Once you I though, any manually tweaks from grub itself aren't remembered - but once I knew what I have to change, I think it was the file menu.lst and then I ran grub-install.
(On mine, I did `grub-install /dev/sdc` because that's where I had grub installed.)

This 1 has mini linux you can mount and browse any part of system.
http://www.hirensbootcd.org/download/