>From the sounds of it, your problem is a Gentoo installation problem.
It's still relevant to post here, you but might get more specific
response from the actual Gentoo Forums (
http://forums.gentoo.org) since
not everyone here would be familiar with Gentoo.
I am still trying to understand the exact problem you are experiencing.
>From what I gather, you have successfully got yourself to stage 3 in
the installation - which generally means you should already have a
fully working system. The process of 'emerge --sync' is simply to
update the package database to then allow you to update packages - but
is not essential to the running of your system at this stage.
What you DO need to do is to install a kernel and boot loader to the
system - which answers your extra question... no, your system is not
quite bootable off the harddisc just yet.
Can you give more details about your network setup? You say the windows
box upstairs uses the wireless - how about the linux machine? Is that
connected through a cable? Or wireless also? You need to make sure
there is the appropriate driver for the networking hardware you own
loaded into the system. Type 'ifconfig' to see what network devices are
listed - or type "dmesg | grep eth" to see if anything was even
detected. If yes (ignoring the ieee1394 driver), try running 'net-setup
ethx' (x= 0,1,2 etc....) .
Post a little more information online, and we might better help you.
Terence