firstly, it is illegal to copy commericial dvd movie which is copyright protected
The PVR maker will not provide you with any tool for illegal activity.
Now, let talk about technical issue on the assumption that you do not live in the UK.
Tool 1 you need, you need a DVD ripping software such as DVD Decrypter click here, I believe that the use of measure to defeat copy-protection is illegal under the UK law.
Tool 2 you need, you need to convert DVD files into AVI, for example DVD2AVI click here, ImTOO DVD Ripper click here