I've never heard of Evesham Technologies and I am not familiar with their recovery cd, if this was a small OEM their recovery disk might be the Microsoft supplied type of OEM that many small builders use. For all intents and purposes the installation
routine on these OEM disks are practically the same as the regular Windows XP retail cd. Just boot the computer with the CD and pay attention and read all the on-screen prompts and instructions.
If it is a true OEM produced CD it still must have a way of returning the computer to factory condition as the Microsoft OEM licensing stipulates, it must be able to format the disk to return the computer to factory condition. Select the option to install
Windows and it should then offer you the opportunity to do a destructive or full install of the operating system.
John