If you have a laptop, you can't replace it, obviously. If you have a desktop computer, you buy a video card for it and disable the integrated video chip from the BIOS.
You need to update your DirectX to he latest Redistributable version (IIRC, Augut 2008 is the latest one). Alternatively, download the file from a DLL repository like www.dll-files.com and put it in the emulator folder.
Took them long enough. Damn. The author of Makaron is probably the only emulator developer that writes periodical status updates in his blog. Now if only he would make his emulator more accessible to the regular users.