When in doubt, install it according to the manufacturer's instructions and
see what happens.

Hey!
     No problem u can go ahead and use the US robotics
modem............As far i understood u have an Aol
connection.....................so it will work fine....
                Make sure u install the drivers of the
new modem.......
      and then detect the modem.....I will tell u how to
do that....
         1.    on the sign on screen of Aol....click on
the tab: setup.
         2.   Then click on: Expert setup.
         3.   Then click on: Devices(modem etc..)
         4.   Then click on: Auto Detect
       Then u have to wait........ the software would
automatically detect the modem.........and give u some
options.............u need to select: Modem (telephone
line connection).
                 Then go ahead and click next....finally
u get the sign on screen go ahead and sign on u would be
able to do that............
                           Thats it pretty simple.....
                Byeee ..Take Care........