this may help
http://www.deliaonlin...-to-use-gelatine.html
I also found this on recipes4us.co.uk
To prepare leaf gelatine, soak it in cold water for 4-5 minutes, allowing it to swell. Remove the swollen leaf gelatine from the water and gently squeeze it out. When using in warm dishes add the squeezed out gelatine directly into the warm liquid and stir until it has completely dissolved. NEVER add gelatine to boiling liquids as this impairs its setting qualities.