If you could, that would render the purpose of having a 'script' protection useless. If you could just do /cmd -e $decode (or some facsimile), then there's no protection.
Correct, it would defeat the purpose of having it in the options dialog.
As mentioned, I'm sure it's possible, just requires a new ini value, and a restart of mIRC most likely.
Actually, the way I see it, mIRC stores it's .ini values in memory after it is opened. Then when it's closed, it rewrites those values back to the file. Meaning you can't just replace something with /writeini, as it won't have any effect, since the old settings will replace it when mIRC is closed.
The only way your ini changes will work, is if you -start- mIRC after you have made the changes. This can be done in two ways:
1.) You can use mIRC to /writeini the changed values to "options," and then /run mIRC, to bring up another mIRC window, and /exit the first mIRC window.
2.) Shut mIRC off completely, and make the changes manually. Then run mIRC again.