When does the bios install the files, at boot time, or when the OS is running?
If at boot, this should require bios drivers for read+write ntfs filesystem support in order to know where in the primary drive the bios needs to install the files, which means the bios can hold a much larger amount of storage then expected.
If when the OS is running, this opens up the potential for many new scarier exploits and backdoors, even for a more secure OS with different file systems, such as Linux or *BSD, beyond just storage, such as memory and network access.
Does this still work with FDE (Full Disk Encryption), such as bitlocker, truecrypt, bestcrypt, pgpdisk, etc.?