on the 2nd computer, if all you needed is the data feed, then you can do the following:
1. open an IB papertrading account (not a demo account). It has the same datafeed as the regular account. It is free to account holders.
2. many charting software allow you to obtain data from TWS located in a different computer (e.g. MultiCharts ). The only requirement is for both computers attached to the same local area network.