Set up a tftp server on your workstation and log into the 1600 routers, type:
copy running-config tftp
and supply the ip of your workstation. Repeat for other router. Here's a free tftp server that's quick and easy to install (you actually just unzip the files and run it - no install):
Then, log into the 1700 routers (before connecting them to the network), connect your workstation with a crossover cable, set up a private network:
interface fa0/0
ip address 192.168.1.1 255.255.255.0
manually assign 192.168.1.2 255.255.255.0 to your workstation, then do the following on the router:
copy tftp running-config
Supply the needed information.
This will copy the config to the router from your pc.
You'll want to do a line-by-line comparison to make sure everythign takes. Sometimes going to a different device or IOS level, the commands are slightly different, or the interface names are different, so you may need to do some manual tweaking.