Acer Aspire L5100 BIOS problems

Hi Guys.

I've been given an Acer Aspire L5100 which I plan on using as a media PC (It's tiny with a slot loading DVD, SPDIF & HDMI output & smaller than a Xbox 360 slim)

But I need to up the RAM to 4GB, (currently 2GB) but it requires an updated BIOS to enable it.

I have tried downloading the official BIOS update from ACER here: http://www.acer.co.uk/ac/en/GB/content/drivers

But when I run the included winflash utility, and select the bios file, I get a "Please select correct BIOS" message!

Any ideas?

There is a thread here with a modified Aspire L5100 BIOS, but the file is no longer in the dropbox.