I'm not certain if it's available to you, but it may be. On the Intel Registration Center page describing 10.1.014, about half-way down, should be a set of two dropdown boxes that allow you to change the version to 9.1 and then one of the available updates to 9.1.
It may be that the 9.1 installer does not recognize the evaluation serial number. What you should do is register the serial number at the registration center and ask it to email you the license file. Save that license file to your disk. When you install, select the option saying you have a license file and point the install to it.
