[APOLAUF]

There are several hundred major obstacles to anything not involving a specific port. Architecture (PCs use CISC processors, PPCs use ARM-based RISC processors that are considerably less powerful per MHz and support a significantly smaller instruction set), memory management, interrupt mapping, display interfaces (there is a mobile version of Direct3D, but it's not equivalent in any way to the full versions of DirectX which run on PC video cards), though from what I remember, the games you mention are older DOS games, so D3D shouldn't be an issue.

However, the biggest problem of all is going to be the operating system. WM simply doesn't have the necessary extensibility required to run those games, even if you were to run an emulator on it. The emulator itself would run so ungodly slow that it'd be hardly worth playing. Keep in mind that these devices can barely muster the goods to run an ancient 16-bit SNES emulator specifically written for WM5+ devices. You can forget trying to run any 32-bit instruction emulation.

So, without an actual port (requires more than just a recompile), it's simply not possible.