Does anyone know how to edit items and where to put them?
And where do i have to put common5_en.pac ?
A lot of the items are found in common3.pac. Use BrawlBox to view that file's contents. For common5.pac, it's placed in...
[SD drive]\private\wii\app\RSBE\pf\system\
Of course, in terms of Riivolution, the set directory could vary, depending on your XML document.