While I was using Windows, I always hated mods, packaged into .exe. Upon installation every damn little mod unpacked itself, launched weidu, "conveniently" updated all weidus in the game folder, then launched self-installation. All this took soooooo long. And all I wanted is to unpack all the mods I need, update all weidu exes at once and then start installing. But I have come to know the true pain when I tried to install Baldur's Gate with mods under Linux. Damn, damn exe's. Rar is no so bad, but still it requires winrar or unrar to unpack it. And, why people even use rar, I wonder? Zip can be unpacked by every single archivator out there. If download size bothers you, there is 7z, with better compression ratio and absolutely free and crossplatfom.
This has changed a bit. WeiDU now has a cre module, which is able to deal with non-default ordering. (It reads the stuff into structures, modifies these and outputs the cre in default ordering.)