PE1850 BIOS update without X Window

[pzero]

Hi,
I am trying to update my PE1850 BIOS to the latest version using the 
Update Package for Red Hat Linux, the file name is 'PE1850-BIOS-LX-A01.bin'.

I am running RHEL ES 3 x86_64 U3 without X Window support.

When I try to run the BIOS update package, I got the following error:

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xterm Xt error: Can't open display: %s
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How can I apply the update?

Thanks.