Acer 5740 ROM size exceeds memory spi

I apologize for my bad English
I had to remove the bios from the motherboard because I created a short circuit burning.
I purchased the new eeprom MX25L8005M2C,
I downloaded from acer, the bios 1.28.
The package contains the ROM for both Windows and for DOS.
In the folder I am JV50128.ROM dos and JV50128.WPH.
I assume that JV50128.ROM is the right one. WPH file instead is 4105Kb.
I tried to flash the file with spipgm JV50128.ROM but the size of the EEPROM is smallest. How so?
I thank you for your reply, if any one