If I understand your quesiton right, you can use raincoat to flash it, or you can modify your Evox.ini to flash winbond bios. That's what I did. Edit your Evox.ini with this info:
Flash = 0x04BA,"ALX2+ R3 FLASH",0x40000
Flash = 0x01a4,"AMD - Am29F040B",0x80000
Flash = 0x01d5,"AMD - Am29F080B",0x100000
Flash = 0x01da,"AMD - Am29LV800B",0x100000
Flash = 0x015b,"AMD - Am29LV800B",0x100000
Flash = 0x378c,"AMIC - A29002",0x40000
Flash = 0x04d5,"FUJITSU - MBM29F080A",0x100000
Flash = 0x04a4,"FUJITSU - MBM29F040C",0x80000
Flash = 0xadb0,"Hynix - HY29F002",0x40000
Flash = 0xadd5,"Hynix - HY29F080",0x100000
Flash = 0x20f1,"ST - M29F080A",0x100000
Flash = 0xc236,"MACRONIX - MX29F022NTPC",0x40000
Flash = 0xbf61,"SST - SST49LF020",0x40000
Flash = 0x20b0,"ST - 29F002",0x40000
Flash = 0x20f1,"ST - M29F080A",0x100000
Flash = 0x89a6,"Sharp - LHF08CH1",0x100000
Flash = 0xda0b,"Winbond - W49F002U",0x40000
Flash = 0xda8c,"Winbond - W49F020",0x40000
Flash = 0x0900,"Winbond - W49F020T",0x40000
You basically just want the last 3, but should put 'em all in incase. If you decide to use Raincoat, then you need to add that info in the raincoat.conf file. Or just add the ones that aren't there.
Should work fine.