That was addressed to Raccoon.
Are you saying that you can use /echo to output lines to a custom window ?. There is nothing in mirc.chm on the /echo command to suggest that, and the cutom window section of same file says use /aline etc .. and makes no mention of /echo.
If I can use /echo then problem solved
Yeah, you can, with at least one caveat being the sorting behavior (which doesn't seem to be a concern of yours). I checked, it's true that the synopsys says #channel instead of window for the parameter.