Softimage Xsi: Cloth - Folds And Crashing

hi ,


i am using cloth for my character and the article of clothing has a thickness to it , when i run the simulation the polys crash and overlap each other, anyways to keep them apart?

also anyone know which slider i must increase so when i use wind and gravity the geometry will fold easier , i moved around alot of sliders and cant recall which one controls this , thx