From the Hoovers Premium search screen (after logging in--see note to the left), click on the Companies tab and enter the company name:
From the dropdown, select the company:
From the company record, click on the NYSE symbol:
Page down to Interactive Chart on the next screen. Select a benchmark from the dropdown menu and click Go. Another company symbol can be inserted on the left for a comparison of the two against the benchmark. You will see both the company and benchmark charted.