the films on sky are Decryptet the only way that i no and have done it is to use an old vhs video 15years+ record your film then if you have a dvd recorder use your 3 pin video leads to put onto disc its alot of messing at first but if you get all the right leads in the right way just leave them set up and keep recording
The Drive must be larger than 700Mb, it must be formated in FAT32 for these files or NTFS for DVD Disc Images as NTFS allows for file sizes over 4Gb.
Well, it can be done.
Ok, you need a video card for your PC that has a video in.
Then take the video out cables from sky plus, and hook it into the input portion of your video card.
Then, start recording the input on your PC and start the playback of the video on sky plus.
An alternative would be to get something like dazzle from pinnacle studios.
Save it to the desired format, and viola a fresh encoded and unencrypted video/audio file.