upgrading from old 2.4.x to 5.0.x

[Craig Dewick <cdewick%lios.apana.org.au@localhost>]

I've got a system (Sparc 20) running a quite old version of NetBSD (2.4) 
and I noticed that NetBSD is now up to 5.0.x.

For anyone who's upgraded from old to new releases, what is the best way 
to go about it?

Craig.

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