problem with the arduino software

Hello im new to arduino and im trying to install the software so i can program it, but i havent been able to run the software..i have a macbook intel running 10.5.8, i did a couple of google searches and tried different solutions i found, like using different unzipping programs and downloading older builds of the software but to no avail...i checked the java preferences and it shows that i have 5 at 32 and 64 bit and 6 at assuming the issue is with java but since im no programmer i cant get past this wall....any kind soul out there that can help me out??