Due to the changes at WoWAce and Curse, the actual downloading must be done by the user - there are things in place that simplify it as much as possible though, details here: http://wuu.vagabonds.info/wuuki/Curse_1.9
I'll look into it later today, or tomorrow morning (CET ;)) - if it's a regexp fix it's quick to get out, otherwise it'll take a few hours tomorrow (I recently reinstalled, so I haven't gotten the build environment up and running yet :( )
Feature: Manual installation from WoWUI and WowAce
"Friendly name" is for addons where the zip file downloaded uses a different name than the directory of the addon.
Case in point: Wardrobe-AL is a continued development of Wardrobe, so it installs to the folder "Wardrobe", but the zip file name is on the format "wardrobe-al-X-YY.zip", which is different enough that the "guessing" code missed it. Setting the friendly name of the addon to wardrobe-al makes the guessing code find it now.
WUU is a program to keep your WoW addons up-to-date, regardless(well, almost, see the FAQ further down) of which site you get them from - WoWAce, WoWInterface, CurseGaming, AuctioneerAddon, GathererAddon, CosmosUI, CTMod, CapnBry, GoogleCode (plus SVN) and DeadlyBossMods are explicitly supported, while the OtherSites module can be used to update addons from, well, other sites. There is also some general Git support.
To get the Windows version of 1.8.605 (and above) to run, you might need this package from Microsoft: Visual C++ 2008 SP1 Redistributable Package - especially if you get an error message about "Windows Side-by-Side" or "application configuration".
Due to addons being available from multiple sites, WUU can be a bit tricky to get started with.
There are some instructions here, which should at least get you most of the way :) Backup your addons before you try WUU, just in case ;)