Ifa takes over the boot process so there is no need to change anything in it
if you defently no the ip of the box
you could always try installing dbox manager (dont use the dbox manager that comes with ifa) and give that a whirl it got a box stuck on loading kernal working for me.
here is guide
1.Install dboxmanager in to C:/ and Add dboxmanager to the exceptions in windows firewall then turn the firewall off,
2.Disable ALL antivirus programs...If you have any Norton crapware disable worm blocking aswell....you might even have to unistall it this includes systemworks aswell
3.Disable any popup stoppers.
4.Give your pc network card a static ip one below the boxes ip
IE:dbox ip:192.168.1.202
IE
C ip:192.168.1.201
subnet mask 255.255.255.0
set to 10baseT_halfduplex
5.Disable any other network cards you have installed including wireless
6.Ethernet crossover cable connected
7.Nullmodem cable connected
8.Turn off box,
9.Put files PPCBOOT,PPCBOOT-readflash and PPCBOOT_writeflash in C:/
10.Put Image in C:/
11.Start dboxmanager
Tick Rarp
Tick Comm-port set to 9600
Tick Boot/TFTP-server and point it to C:/ppcboot_writeflash
Tick NFS-server starten and point it to C:/
Leave Konfig empty
12.Click utilities
13.Click flash image and select image which is in C:/
14.Press ok if it goes to a comm window turn on the box.
15.If you get error 10048 something is still blocking the network
Hope this helps.