Upgrade from 32-bit to 64-bit Fedora Linux without a system reinstall

[Rahul Sundaram <sundaram fedoraproject org>]

Hi

Not sure if this is worth the effort. Maybe we should look at making the 
transition more easier.

http://www.linux.com/feature/123800

"Updating from Fedora 7 i386 to Fedora 8 x86_64 isn't supported, and 
many folks will tell you to just reinstall in order to move to a 64-bit 
Linux. However, I managed to resolve the main problems when doing a yum 
update in a single day. Your mileage will vary depending on what 
third-party repositories you're using, how much software you've 
installed by hand, and how dependent your software is on the system 
libraries."

Rahul