Both versions are within same mod, only with difference launchers. One for DD1 cars, one for DD2 cars.
A guy named Harmalarm have for some time developed a mod for our beloved Carmageddon 2. This mod is a total convention, and it's a own game now. The mod is sized 12 MB, but it is possible to download the DD2 intro movie and use that if wanted.
I'd urge everyone who enjoyed the first two DD games to get this; a truly astounding piece of work from one of the best Dutch C2 enthusiasts of recent times.
whatever program you guys use, ill host and have on almost all the time ( excluding the usual pc maintenence... provider downtime electricity cut outs etc )
Hamachi seems to be the best suitable program, since the launchers within the game are set to work with it. If there are other programs that emulates LAN networks they probally could do the same trick