File list (Check if you may need any files):
USB_KEIL
........\0101
........\0101.hex
........\0101.M51
........\0101.Opt
........\0101.plg
........\0101.Uv2
........\0101_Opt.Bak
........\0101_Uv2.Bak
........\123.txt
........\123456.txt
........\2009-4-3.txt
........\2009-4-4.txt
........\c8051F020.h
........\Chap_9.c
........\CHAP_9.H
........\Chap_9.LST
........\Chap_9.OBJ
........\D12ci.c
........\D12CI.H
........\D12ci.LST
........\D12ci.OBJ
........\Isr.c
........\isr.h
........\Isr.LST
........\Isr.OBJ
........\Mainloop.c
........\MAINLOOP.H
........\Mainloop.LST
........\Mainloop.OBJ
........\MSSCCPRJ.SCC
........\Proto.c
........\proto.h
........\Proto.LST
........\Proto.OBJ
........\STARTUP.A51
........\STARTUP.LST
........\STARTUP.obj
........\USB100.H