>>"I need to temporarily change the PC's IP settings to static IP address "
To configure a static IP address on the PC go to control panel | network connections | right click on the appropriate network adapter and choose properties | highlight Internet protocol (TCP/IP) - [Vista choose Internet Protocol version 4 (TCP/IPv4)] and click properties | enter a static IP (probably 192.168.0.x), in the same range as the Netgear DG602, and configure the subnet mask 255.255.255.0, and gateway (the router's IP).