1.  Go to Start> Settings> Control Panel. 

2.  Double-click System and select the Hardware tab (see Figure 1).
    
                                                                                               Figure 1

3.  Select Device Manager and you will get the next screen (see Figure 2).
    
                                                                                                                                                        Figure 2                                                 

4.  Double-click the Digi AccelePort Xem product to get to the properties screen (see Figure 3).
   
                                                                                             Figure 3

5.   To add to add an additional Xem module to an existing installation.  Select the Module you have (see Figure 4) and click OK.
     
                                                                                   Figure 4

6.   You will see that the second Xem Module has now been added to the adapter (see Figure 5).
     
                                                                                              Figure 5