Routing 4 network cards

[Sjaak Nabuurs]

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Wireless USERS                                          Wireless USERS

                       W   W   W   W   W   W           W   W   W   W   W   W
                      |-| |-| |-| |-| |-| |-|         |-| |-| |-| |-| |-| |-|
                      |-| |-| |-| |-| |-| |-|         |-| |-| |-| |-| |-| |-|
                         192.168.3.2-254                192.168.4.2-254
                                   ~                         ~
                                   ~                         ~
                                   ~                         ~
                                   ~                         ~
                                   ~                         ~
                                   W 192.168.3.1             W 192.168.4.1
                                 |---------|              |--------|
8Mbit      |------|   WIRELESS   |         |              |        |
INTERNET ==|  A   |W~~~~~~~~~~~~W|FreeBSD1 |W~~~~~~~~~~~~W|FreeBSD2| 
           |------|  192.168.0.1 |         |192.168.2.1   |        |
              |192.168.0.138     |---------|   192.168.2.2|--------|
              |                       |                      |
              |                       |192.168.1.1           |192.168.5.1
              |                       |                      |
              |                       |                      |
 192.168.0.150|                       |                      |
           |------|               |------|               |------|
           |HOME  |               |HOME 1|               |HOME 2|  
           |------|               |------|               |------|

A = Router Acatel DSL

 W = Antene
|-| 
|-| = Wireless User (20 Wireless users)


I hoop the drawing is readable !

The Facts :
OS FreeBSD 5.2 (is it stable for this problem or better to use 4.x)
With 4 nic's inside

RL0 =  192.168.0.1  
RL1 =  192.168.1.1
RL2 =  192.168.2.1
RL4 =  192.168.3.1


I like to connect RL1/2/3 to RL0 (internet)

HOME1 and HOME2 are the system administrators and need to manage the whole network include the users
Everybody need access to the internet

I like to have a start how to setup FreeBSD 1

I like to use dummynet(compiled and works very nice) to manage traffic let's say 
192.168.3.1/26   100Kb/s 
192.168.3.64/26  200Kb/s 
192.168.3.128/26 300Kb/s
192.168.3.192/26 400Kb/s
Count every user with ipfw count

---------------------------
#!/usr/local/bin/bash
for ((a=2; a<=254; a++))
do
IPCOUNT = "10"$a"0 add count tcp from 192.168.3.$a to any"
ipfw $IPCOUNT 
done
----------------------------

And now the question about FreeBSD 1 (forget FreeBSD2).
Give me a good hint how to set this up with ipfw and NAT
I googled many but ther's not that much about information about 3 or more nic with freeBSD.

I think I have to use NAT, but can i use it in combination with ipfw to dummynet out/ingoing traffic over the nic RL1/2/3
And how can i "HOME1" go accross the whole network RL0/2/3 


Sorry for my English and I hope I give anough explanation about my plan.


Thanks anyway for looking at my problem.