you dont use ybox
the ms dash = xboxdash.xbe which means u dont rename it
evox = evoxdash.xbe (which you ftp to your xbox, default.xbe of evox renamed to evoxdash.xbe)
adjust your evox.ini if needed to the MSDASHBOARD=xboxdash.xbe (it might say msxboxdash.xbe, correct it)
and your disc doesnt boot, well add more dummy files then, 80mb dummy + 3mb evox = 83mb on a 4gig disc.....yeah u get the idea....or use a cdrw then.
and as for your xiso tool, i have no idea what that is, that url doesnt even work. use craxtion or simplexiso, do NOT USE that xiso by yurisoft. ANYTHING but that one.