Gravity(tm) error handler???

[KohakuSan]

Look for winrar, winzip, any extractor like that on Google, download and install it. You can open the sakray files you downloaded now, when you open it(just need to open 1)choose to Extract all files and click on Setup or Install inside the folder that was just created where you extracted the files on, this will install Sakray.
If everything goes alright, install the HeRO mini installer after opening Sakray.exe and letting it patch all the way. Last thing now is to let HeRO patch download everything, and you're done.