Gabriel,
( I meant to send to the list instead of sending to gr, sorry. )

> My problems start when I try to set up the network. This machine is

Assuming sysinst has a problem on doing ifconfig (or nfs mounting),
and you do ifconfig before running sysinst, does your question
go away ?

See
http://www.ki.nu/software/NetBSD/PowerPC/sysinst/000-README.shtml
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Makoto Fujiwara, Chiba Japan