FireWire786

I got the link from here: http://Olarila.com/forum/viewtopic.php?f=16&t=2198 .I got two PCs,HP DC5700(Win8.1) and DELL DIMENSION e521(WinVista) . .I burn the .raw file on a 16GB USB(Lexar). .The HP DC5700 have 2 3.5 HDD(One of them have windows 8.1 and the other is empty) The dell only have one. .I want to install Snow Leopard on my HP DC5700 because its faster than the dell and it have a Intel Processor unlike the dell dimension which have an AMD Processor. HP DC5700 Specs: CPU: Intel Core 2 Duo E6300 Motherboard: 0A60H GPU: intel chipset family The problem is that the my HP DC5700 wont boot in to my USB(which have snow leopard on it) it just ignore it and went straight into Windows 8.1 but my dell dimension was able to boot into my USB,how come I though this .raw can only work on intel not amd. is there something wrong with my HP DC5700 or what plz help

I Need help,you said i need to delete Extensions.mkext on the USB and i did that but it keep telling me "An unexpected error is keeping you from deleting the folder."