You need 'unace' program to unpack game files. On Debian you can install it with: sudo apt-get install unace
In the directory with game files run: unace x ttotd.ace
You can also unpack sound files with command `wine mythxpak.exe myth.pak`
but at least on my system, having sounds in place causes the game to hang up after pressing a single button. You have to patch wine to get sound to work.
PART 2: Getting sound to work:
As of wine version 1.1.27 it is still necessary to apply a patch to source code and recompile. Big thanks to Torbjörn Söderstedt for the fix (see BUG 18823).
Below are instructions specific to Ubuntu, but they should be easily adaptable to any Debian derivative.
If wine version contained in your repositories is outdated, before proceding, you should consider updating your sources (see http://www.winehq.org/download/deb for more details). Do it with the following:
Add the repo (replace `[YOUVERSION]` with `hardy` or `intrepid` or `jaunty`): sudo wget http://wine.budgetdedicated.com/apt/sources.list.d/[YOURVERSION].list -O /etc/apt/sources.list.d/winehq.list