Windows XP NAT

Hello, habrarakakaly :) Trying to set up the Internet for the hostel, while not very. Knowing that the resource is full of literate people, I ask for help in this difficult task. In gratitude, I promise to write a detailed post with pictures and HOWTO-shnoy extravaganza about the problem.

First I will tell the essence of the problem. There is a computer, it is connected to the local network through the interface

LAN0, has
IP address 192.168.15.15,
mask 255.255.128.0.
')
Through the same network card through PPPoE goes "dialing" to the Internet. There is another LAN1 network card in the computer, into which the WiFi access point is plugged.

LAN1 IP 192.168.130.51
mask LAN1 255.255.128.0
gateway left empty

At the access point itself is written:
IP 192.168.130.50
mask LAN1 255.255.128.0
GW 192.168.130.51

A laptop is connected via WiFi,
IP: 192.168.130.52
mask: 255.255.128.0
GW: 192.168.130.51

in Windows XP, NAT (not ICS) is enabled by ognivo777.livejournal.com/36093.html to such a guide. NAT is routed between LAN0 and LAN1 interfaces. (LAN0 - full, LAN1 - private).

The network belonging to LAN0 is pinged from a laptop, for example, 192.168.2.22, but the Internet is not pinged (even over IP, without using DNS addressing). Actually, I want the Internet on a laptop on NAT.
In short, the scheme is

Internet = (LAN0) => Computer = (LAN1) => WiFi Point => Laptop.

I foresee questions:
1) The proxy does not want, for obvious reasons.
2) It will not be possible to open a shared access to the Internet connection via ICS: it tries to assign the IP address 192.168.0.1 to the LAN0 network card, which is unacceptable in the existing network, since already taken.
3) In theory, you need to build NAT between LAN1 and the PPPoE interface, but those in Windows are not considered interfaces, as netsh says. It talks about the availability of LAN0 and LAN1 only.