dvd computer interactive ripoff

Having recieved the 2 disc dvd collectors edition I looked forward to accessing the "extra" features via my computer only to find the interface included with the dvd does not work if you have powerdvd or windvd installed on your computer. Having followed the links provided via the root directory in the dvd drive (sneaky eh?) I found out the interface company is providing a plug in for windvd but at a price which I find totally unacceptable as a) We shouldnt be paying any more money out after the initial purchase of the dvd. b) I do not have windvd on my computer which would also neccitate me purchasing that as well as the plug in so i can access the computer features. c) As most computer dvd drives when bought usually come with cyberlinks powerdvd as the default software then why hasnt the interface company concentrated on making a plug in for that as well as windvd ? I feel this is exploitation of the fan base completely and am very dissapointed that an item bought and paid for cannot be fully used without other purchases due to the commercial greed of some companys.

Thank you for being a sounding board for these gripes ,other than that its a great dvd set.