Wallace & Gromit: Episode 1: Unable to make any action (potential spoilers)
 

I purchased the CD version of the game at a retail store. I had run into the same problem a few others have had recently with the first episode in that when Gromit goes to town, the game freezes when you try to do anything. I used the method mentioned (removing the .dlg file though I stored it in a temp folder rather than deleting it) that helped to make that part passable, but now I'm up to the final part where Gromit is driving the truck. Nothing is showing up as something I can interact with which is causing me to be unable to complete the game. I can access my inventory but that's about it. While there were minor bugs in some of the other episodes, this episode seems to be the only one that has had bugs that made it unplayable. :(

Hmm, now this might be a new issue. Could you try going back into that same folder and deleting the env_CountryRoad.dlg and see if that affects anything? If not could you let me know? Thanks!

That seemed to do the trick. Wonder why removing a file seems to work. Anyways, thanks for the temporary fix.