yesterday I tested the limits by putting a harddrive with installed Ubuntu into a different (IBM X41 to other IBM X41; not too much different) computer. The effect looks good, everything starts fine, only network "initialisation" waits (it says "Waiting for network configuration..." while starting), waits another 5 seconds and then starts without a network connection. Obviously there is different networking hardware installed. So what can I do now? Reinstalling Ubuntu with a stick would be easy, but not my favored way.
Therefore my question is:
How can I "remap" the installed hardware for networking drivers and networking settings a it is done when booting from a stick or installing Ubuntu?