You can do a few things in regards to the OEM o2 sensor.. Replace it with the wideband sensor, disable closed loop & heater and just run the car on the ECU values or add another bung in the exhaust so you can have both wideband & o2 sensor.
If your wideband has a 0-1v output then you can connect that to your ECU eliminating the need for a stock sensor, I am aware that you can also use 0-5v values aswel.
For datalogging you make or buy a cable, which then wires into the ecu and connects to your laptop via a serial or usb port.
If you were talking about connecting the ecu to the laptop to make changes, you use a moates chip burner, take the chip out of the ecu, put it in the chip burner (which connects to your laptop/computer via usb) and use the software to burn the new map values. If it was in regards to real time programming, you use an ostrich, but I am not very familiar with this method
The laptop that I use is only a P3 500mhz with 128mb of ram, nothing spectacular, im sure you could do it with a P2 300mhz and 64mb of ram
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