Dreamcast -- How to connect two controllers at the same time?

[sofakng]

How can I hookup two Dreamcast controllers and an IPAC/2 up to my arcade controls?  I was going to use a DB25 switch but I've been told that if I do it that way I can only hook-up one DC pad at a time (each pad takes up 13 pins so a 25 pin connector won't work for two pads).

Is there any other way I can hookup both the *two* Dreamcast controllers and switch it between my IPAC?

[Hiub1]

I think that you don't understand what I am talking about. By having each of the player inputs on the Ipac hacked to a DB25 connector, and by having each set of controls for each player hacked on to another DB25, you can switch between the Ipac and the DC. Instead of using 1 switch you would just have to use 2. All you are doing is separating all the inputs to a per player  basis. This way it becomes fully modular, and Ipac player 1 can hook up to player 1 arcade controls, or DC player 1 can hook up to arcade controls, or both at once. I don't know if that makes any sense, but see if that explains it.