These are the downloads for the custom maps run on the TF2sday server. Download the zip file and PAY ATTENTION about where to unzip them - THEY ARE DIFFERENT.

Map pack #01: http://dl.dropbox.com/u/52408373/map_pack01.zip
Open zip file and dump everything into the folder *ABOVE* the maps folder. So,
C:\Program Files (x86)\Steam\steamapps\[your steam profile name here]\team fortress 2\tf\
i.e. the maps folder inside it should dump into tf\maps, and the materials folder should dump into tf\materials.

Map pack #02 (Little Cart Pack):
http://dl.dropbox.com/u/52408373/map_pack02.zip
These files go directly into the maps folder, so just open it up and dump them in C:\Program Files (x86)\Steam\steamapps\[your steam profile name here]\team fortress 2\tf\maps

Map pack #03
http://dl.dropbox.com/u/52408373/map_pack03.zip
Like #1 - unzip *ABOVE* the maps directory, so
C:\Program Files (x86)\Steam\steamapps\[your steam profile name here]\team fortress 2\tf\