Torn gastrocnemius muscle

I was playing squash 27/12/05 and felt an excruciating pain (like ripping) in my calf area. I was diagnosed with a torn gastrocnemius muscle and put in plaster for 6 weeks.I have now been out of plaster for 4 weeks and still do not have the full use as before.I can walk for roughly 1-2 hours a day before I start to feel in pain again.Does anyone know or have any idea roughly how long this will take to return to normal!!!!!I was given certain exercises and stretches to do and advised to gradually walk more but I have to say its still not comfortable for me.Any advise would be welcome!!