Join 2 Networks

Hi all
My current topology is
Network 1 I have 60 machines they get get IPs from a DHCP 192.168.0.x
I have 2 48 port cisco switch 2950XL to connect all machines and 1 1720 cisco router which has two interfaces 1 to the internet the other to local LAN
Network 2 has 4 servers with IPs 10.0.0.x a switch and cisco PIX
firewall, the pix has 2 network interfaces 1 is GW for the servers and
192.168.10.x for the external network.

Incase i want to access servers on network 2 I have to change the ips
192.168.0.x to 192.168.10.x with a GW of PIX outside interface.
I want to join both networks. I do not want to keep on changing the addresses. Below is a show ver for 1720

Cisco IOS Software, C1700 Software (C1700-Y-M), Version 12.3(14)T1,
RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Thu 31-Mar-05 13:40 by yiyan
ROM: System Bootstrap, Version 12.2(7r)XM2, RELEASE SOFTWARE (fc1)
gw-router uptime is 4 days, 20 hours, 5 minutes
System returned to ROM by power-on
System image file is "flash:c1700-y-mz.123-14.T1.bin"
Cisco 1721 (MPC860P) processor (revision 0x500) with 56468K/9068K
bytes of memory.
Processor board ID FOC09181RTT (4115645989), with hardware revision
0000
MPC860P processor: part number 5, mask 2
1 Ethernet interface
1 FastEthernet interface
32K bytes of NVRAM.
32768K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102

Thanks

mmahiva