Distro multiboot

[minitiss]

What I want to achieve.
I have an external hard drive that I want to use for linux/windows installations. All the images will be located on the hard drive of course.
What I really want is some kind of bootloader where I can choose what distro I want to install.

If I install linux and grub on the external hard drive, can I then put an image in the folder /images/ubuntu.iso and configure grub with the option to start the ubuntu.iso?
Or is it necessary to install linux in the botton or is it possible to only have a bootloader on the hard drive?

If it's not possible to use grub to load images for installation, is there any other tools I can use to achieve this?

Thanks in advance.

[Pumalite]

Take a look at this thread:
http://ubuntuforums.org/showthread.php?t=352869

[minitiss]

bump!

[housam]

Look at this guide (http://ubuntuforums.org/showthread.php?t=724817) by Bodhi.zazen

[minitiss]

It isn't multibooting I really want.
I want to know if I can configure GRUB or any other bootloader to run an installation file located on a ISO-file.

As an example I would like to put iso-files of ubuntu, slackware, windows and centos in the folder on an external hard drive and then take connect the hard drive to an random server without any OS, boot to the external hard drive and then via the bootloader choose what operating system to install.

Is it possible?