LMAO all these windoze users.... wow... stuffit expander is better then winzip, free, faster, more versatility, and it's compatabilities thru the roof. check in prefs and see how many different formats it can read. the files most commonly used are .sit, .bin, .hqx(usually .hqx.bin), and to a lesser extent, .dmg or img. those last 2 can't be opened at all on windoze, i believe.