Here's how you would get started adding IFocus software for 2 additional
accounts to a pc already running 1:

Create 2 new folders on your c: drive, one for each account you will trade
online.  Name each with the account number assigned.  For each account,
point your web browser to www.rcgpsd.com/installFiles2/ifocusLiveSetup.exe.
Click on "Open" or "Run".
 
Follow the prompts in the Installshield, making sure to install the software 
to the new folders you'vecreated (not to the folder "OnlineTradingV4") and 
indicating "New Installation" when asked (for each new account).

After each installation you will have a new  shortcut created on your
desktop, which you should rename to the account number you will be trading
by right-clicking on it and selecting "Rename".

You can run the 3 programs at the same time and be logged in at the same
time.  Switch between the programs by clicking on the buttons in the Windows
taskbar.  It's important to note that the first program launched will retain
control of the F function keys--in other words, you can be looking at the
Order Management Facility for the second or third program launched, but if
you open an order ticket using the F keys, you will see that the order
ticket is actually for the first program launched.

When placing orders, please make sure that the correct account number is
displayed in the lower left of the order ticket.