How to update BIOS in Dell laptop?

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http://askubuntu.com – I have installed Ubuntu 11.10 on a vista laptop, but Dell is providing the BIOS update in .exe format currently my bios version is A09 but on the driver download site the latest version of bios is A011. Help me out to update the bios. My laptop information: Libsmbios version: 2.2.28 Product Name: Studio 1537 Vendor: Dell Inc. BIOS Version: A09 System ID: 0x029F Service Tag: HBVV2BS Express Service Code: 37723945096 Upon running sudo update_firmware I get the following set of errors: E: Unable to locate package pci-firmwa (HowTos)