Like Ira said you need to drain the radiator (drain plug is provided at the bottom right side). If you connect a small hose to the drain valve and use a clean bowl/pan you can probably re-use the coolant. The lower hose then needs to be removed to install the main serpentine belt. I believe all the tensioners have an 18mm center bolt that you need to put a big wrench or socket on, to relieve the tension and replace the belts. The SC belt is usually the tightest and is best installed by placing it on both the jackshaft & SC pulleys first, then using a wrench (versus a socket) snuck in between the belt & tensioner, relieve the tension and slip the belt over the tensioner pulley. The main belt should last 60,000m especially if you buy the GoodYear Gatorback ones and I've found varied life for the other 2 say around 25-30,000m depending upon how fussy you are with preventive maintenance. Ford says you can wait until chuncks of the ribbing start falling off, but I usually change them when the cracks get about 1/2" apart.