No, I was just giving you an example of how to start an Atari2600 game with z26 with the fullscreen option you might want.
In MameWah, you would need to edit the INI file which is related to the z25 emulator. I have not used MameWah in a couple of years, but I think you need to set the "emulator_commandline" value to the following:
[emurootpath]\myz26path\z26.exe -v8 "[rompath]\[name].[romext]"{nodosbox}{safelaunch}
However, to get MameWah set up correctly you really should repost another question to the forum with the Subject text as "Need help configuring MameWah for z26 fullscreen" and see what people say. I am not sure a lot of MameWah users are looking at this thread ..... or at least they are not chiming in with suggestions.
Now, I could be wrong, but it does not sound like you have ever used MameWah successfully before .... is this correct? If so, you should know that MameWah is pretty much meant for people who like to configure stuff manually. I am not one of those people so I prefer to use a frontend with a nice GUI interface. Basically, I do not like creating/editting INI files by hand. As a result, I use MALA since it is a snap to configure. Let me know if you ar dead set on using MameWah or whether you would like help with MALA. If MameWah is a must, then I would suggest reposting another thread. If MALA is worth a try, we can try to get it working for you.