I am fixing up a pc case to house an Xbox. I already know about the Apache that will allow me to use an ATX power supply in replacement of the Xbox psu. Would I just splice the Molex that connects to the apache, and create Y-splitters in order to use it with other systems (ps2 and dreamcast)?? Cause I would like to have a ps2 and dreamcast along with the Xbox in the pc case, but want it all wired to 1 power supply.

Don't splice the connector, just order a y splitter and put the apache on one end and adapters for the others on the other end. And contact the guys at tribemods, I've heard they plan on releasing the comanche which will allow you to power both a ps2 and xbox from one atx psu with one adapter.

Nice. I wonder if anyone else can confirm, and/or give a timeframe.

Also, if I chose to use the Y-splitters, how would it affect the mobos on all the 3 systems? Could I run more than 1 system at a time?

With just a y-splitter, I'm not sure how the power buttons would work exactly....the apache makes it so that when you hit the xbox power button the psu powers on.....you'd have to create a switching mechanism to only provide power to one at a time. I don't know enough about how the other systems work to help you out much, sorry. But I'm sure the comanche at least works it out for ps2 and xbox.

Thanks for the info. I guess i'll have to research more first. I wonder if games can be loaded onto a larger HDD to be used with PS2.