How to adjust the DNS priority for mutiple connections

Hi,

• PC1: Windows 7
• PC2: Windows Vista
• PC3: Windows XP

First, I'm testing on PC1. I'm using a 3G modem and already set up a dial-up Internet connection successfully. Now we are using a 3rd-party VPN client software, which always creates the VPN connection asLocal Area Connection type automatically, instead of Dial-up Connectiontype. The VPN server disabled using remote gateway while accessing remote network, but using static routes via DHCP option instead (tunnel splitting). Now the problem on PC1 is, Windows still uses the DNS server addresses which configured on 3G connection after dialing in VPN, not using the ones on VPN connection. So I Windows cannot resolve the DNS name for remote network. Any solutions?

Thanks,
高麻雀