I am sorry about my multitude of questions but sometimes I can read things a million times and still not understand. Would I have to use either ampr-ripd http://wiki.ampr.org/wiki/Ampr-ripd, or rip44d http://wiki.ampr.org/wiki/Rip44d on the server to forward the traffic to my AMPRnet box? Would I have to use either ampr-ripd http://wiki.ampr.org/wiki/Ampr-ripd, or rip44d http://wiki.ampr.org/wiki/Rip44d to tell the server where to send the AMPRnet traffic cumming from the box.
Rip44 is not for forwarding. It is used to populate the routing table for the IPIP tunnel system. The forwarding is done by the kernel and is configured the usual way. I.e. forwarding is to be enabled in the kernel and the proper interfaces and subnets are added.
You would be setting up the AMPR IPIP tunneling on your brother's computer (first ask if he agrees with that) and you get a subnet from your coordinator, e.g. a /28 network, where your brother's computer gets an AMPRnet address and your own computer gets another address in the same subnet, you set your brother's computer as the default gateway, and all AMPRnet traffic is forwarded via your brother's computer that will tunnel it over the IPIP network.
The ampr-ripd running on your brother's computer will receive the AMPRnet RIP packets and maintain a routing table with about 400 routes, plus it has the locally attached AMPRnet subnet that was assigned to you. All AMPRnet traffic is forwarded between the IPIP tunnels and your local subnet.
Or can I use a "simple" tool such as BIRD Internet Routing Daemon http://bird.network.cz/ http://bird.network.cz/ (the first thing that came up when I searched for ipip routing deamons).
No. That software only handles standard protocols, and RIP44 isn't one. (well, it almost is, it is just RIPv2, but the handling of the information by the routing daemon is different)
An alternative when you do not want to do as much on your brother's computer and do have a Linux system yourself, is to just forward all IPIP traffic received by your brother's computer to your computer over the local network, and run ampr-ripd etc on your own computer.
Rob