How to set a host with public IP within a private network?

Linux Advanced Routing and Traffic Control

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Hello! I have the following setup:
1) a connection to my ISP with a public IP (1.2.3.4)
with the gateway 1.2.3.1
2) an allocated IP class with 64 addresses
(5.6.7.192/26)
3) two LANs connected through two NICs:
    a) 192.168.0.0/24 on eth1 (192.168.0.1)
    b) 10.0.0.0/24 on eth2 (10.0.0.1)

The IPs from the allocated class are all assigned to
eth0.
The networks are SNATed to the external IP and to all
IPs in the allocated class in a round-robin fashion.
 (-j SNAT --to 1.2.3.4 lowest_IP_in_class
highest_IP_in_class)

My question is:
Is it possible to assign one IP from my allocated
class to an internal machine without changing eth1 or
eth2 IPs *OR* without adding a subclass of my
allocated class to eth1 or eth2 in order to give an ip
to an internal networked machine?
What command should i give if that setup is possible?
Desired Network Diagram:

    ----------
/---|Internet|
|   ----------
|eth0                  192.168.0.1           10.0.0.1
|  ----------             eth1                 eth2
\--| Linux  |--------------v--------------------v
   | Router |              |                    |
   ----------              |                    |
                           |                    |
      -------------        |      ----------    |
      |192.168.0.2|--------<      |10.0.0.2|----<
      -------------        |      ----------    |
            .              |           .        |
            .              |           .        |
            .              |           .        |
     ---------------       |      ------------  |
     |192.168.0.254|-------<      |10.0.0.254|--<
     ---------------       |      ------------
                           |
                           |
     -----------           |
     |5.6.7.201|-----------<
     -----------

I would de-assign some of the addresses from eth0 to
re-assign them to locally connected computers...

Thank you in advance for your help!



		
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