There was another thread here somewhere that explained how to use Wine & IEs4linux to get these titles running under linux. I'm happy to report that recent developments with the Wine HTML rendering engine (Gecko), means that things are now a lot easier in this regard for puzzling penguins...
If you're up to compiling/installing the wine-devel branch on your linux box, here's the cliff-notes;
Grab the wine-1.1.31 (or better) source tarball from WineHQ
Unpack/configure/compile/install wine-1.1.31 (or better)
Get 'winetricks' from the following URL ;
Use winetricks to install the following dependencies;
After all this is done, install your W&G title as normal.
Change directory to where the actual game executable is located, and launch the game with wine..the following examples 'The Last Resort' episode installation;
bash-3.2$ cd ~/.wine/drive_c/Program Files/Telltale Games /Wallace and Gromits Grand Adventures/The Last Resort
bash-3.2$ wine WallaceGromit102.exe
Game should now launch and run....(runs well actually)
Now...if the above is beyond you, (or you happen to use a Mac), I can tell you I'm an advocate for the W&G Telltale Games episodes compatibility database entry over at the Codeweavers Crossover website, and I have a support ticket open there wrt getting these great titles running under Crossover-games...(currently they don't, however the demo versions of the W&G episodes run fine)...the devs over at codeweavers know about the changes I've found wrt wine-1.1.31+ & gecko (apparently it's one of the codeweavers devs who does a lot of gecko devel), and they're going to look at incorporating these Wine based improvements into some *future* release of crossover-games...I don't know when/if that will be, but my guess is 'sometime after crossover-games 9.0 is released' - at present we're at version 8.0....so like I say, eventually one day these TellTale Games W&G episodes should work 'out of the box' as they say with crossover-games...