This happened more than 3 times while loading gNS metad to a Yeeloong using the USB method posted on the wiki.

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After I answered the questions about the command line and default
command line ("quiet"), I got a dialog box with the header:

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Configuring linux-image-2.6.32.11-libre1-lemote.

"You are attempting to install an initrd kernel image
linux-image-2.6.32.11-libre1-lemote. This will not work unless you have configured your boot loader to use initrd. (...)

I repeat, You need to configure your boot loader - please read...

If you have already done so, and you wish to get rid of this message, please put "do-initrd=Yes" in /etc/kernel-img.conf.

Note that this is optional, but if you do, you will continue to see this message whenever you install a kernel image using initrd.

Do you want to abort now?"
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I answered 'no' and continued.

Later on I got a second message, with the header:

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!Continue without boot loader
No boot loader installed

"No boot loader has been installed either because you chose not to or because your specific architecture doesn't support a boot loader yet.

You will need to boot manually with the /vmlinux kernel on /dev/hda1 and root=/dev/hda1 passed as a kernel argument."
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I finished the install and re-booted normally without any problems.
I saw a Grub screen as I have previously.