you can write a script that will load a config file from a tftp server... or you can edit a file similiar to the following:
!sample router config
!
hostname C2500-R3
!
ipx routing 0000.0c3e.36ce
!
interface Ethernet0
ip address 180.234.34.129 255.255.255.128
ip ospf priority 0
ipx network 34
bridge-group 1
!
interface Serial0
encapsulation frame-relay
frame-relay lmi-type ansi
!
interface Serial0.1 point-to-point
ip address 180.234.234.3 255.255.255.0
ip ospf network broadcast
ip ospf priority 0
bandwidth 56
ipx network 234
no ipx split-horizon eigrp 234
frame-relay interface-dlci 302
bridge-group 1
!
router ospf 180
network 180.234.234.0 0.0.0.255 area 0
network 180.234.34.128 0.0.0.127 area 10
!
router rip
version 2
passive-interface Serial0.1
network 180.234.0.0
no auto-summary
!
ipx router eigrp 234
network 234
!
ipx router rip
no network 234
!
bridge 1 protocol ieee
!
end
>>> and then load it manually from the tftp server
cisco tftp server is available here
free =>
hope that helps... take care