Before installoing Gabest, you must uninstall Haali.
To install Gabest, you need to put the matroskasplitter.ax file into a folder that will remain where you put it. Now, in this folder, create a new text file and put in the file this code:
Code:
regsvr32 /s matroskasplitter.ax
Now, rename the text file as "register.bat" instead on new file.txt and double clik on it.