How do i replace the windows from archimesh into custom mesh? (broken windows)


Hello, I’m trying to make a broken window here but the window’s base is from archimesh. but, the first idea i came up with was just using a boolean.

so, first I add plane for base of broken window and cut it out with knife. so it looks like this;

but the problem is, I couldn’t replace the windows with boolean which is supposed to be like this;

(from Abandoned House tutorial by Blender Guru)

is there any way to work around it? thank you so much

anyway, sorry for bad english.