Ubuntu to Debian Installation

[Stef Daniels VK5HSX <vk5hsx@wia.org.au>]

Greetings,

      I have got several Debian installations, however, my desktop
machine has Ubuntu 6.06 installed. What I wish to know is if there is an
easy way to change installations (without actually going through the
install) by changing the repositories and doing 

#apt-get dist-upgrade

as I know that apt has "Super Cow Powers" 8-)

Is it wise to do it this way?
Has someone else done this?
Any tips, tricks to doing it?
-- 
Regards,

Stef Daniels VK5HSX             (OpenPGP:0xFDE007F6)
Amateur Radio Station
Adelaide, South Australia
E-mail: vk5hsx@wia.org.au
Member Wireless Inst. of Aust.  (www.wia.org.au)
Proud Debian GNU\Linux User.    (www.au.debian.org)