How to install NetBSD on a USB stick

[Mayuresh <mayuresh%acm.org@localhost>]

I wish to install NetBSD 7.0 i386 on a laptop on a USB stick. This is for
testing purpose, not for day to day use.

I know I can boot from an installation image from a USB stick. However I
want to carry out the installation on a USB stick.

The installation procedure that works with a hard disk did not work. I am
not sure whether setting up geometry etc. needs to be done differently if
the target drive is a USB stick.

I notice a memstick image for 5.1, but not for 7.0.
http://ftp.netbsd.org/pub/NetBSD/NetBSD-5.1/memstick/

Also notice a couple of more URLs talking about this, but nothing found in
NetBSD documentation or mailing list:

http://implementality.blogspot.in/2012/09/netbsd-on-stick.html
http://www.jibbed.org/

Would appreciate inputs in this regard.

Mayuresh.