Windows XP and 200GB external Firewire issue with size

[NEM1S1S]

Client has a Western Digital External Firewire 200GB WD2000JB and a COMPAQ EVO N1020V.
Compaq is running Windows XP with SP1a installed. PC will only recognise 137GB of the 200GB drive, Compaq Notebook is running latest BIOS (BIOS F08)

Went onto the WD site and followed the following:

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Question
Why is the full capacity of EIDE drives larger than 137GB (128GB binary) not recognized in Windows 2000/XP?

Answer
Problem
The full capacity of EIDE drives larger than 137GB (128GB binary) is not recognized in Windows 2000/XP.

Resolution
48-bit LBA support is necessary for drives larger than 137GB (128GB binary). The following conditions are necessary for the correct functioning of 48-bit LBA support in Windows 2000/XP:

Windows XP Service Pack 1 (SP1) must be installed for Windows XP versions prior to August 2002. For information about SP1, see Microsoft Article 322389.

The system must have a 48-bit LBA-compatible Basic Input/Output System (BIOS) installed. This includes EIDE controller card BIOSs.

You must enable the support in the Windows registry.

The Microsoft Knowledge Base articles listed below provide important information about 48-bit LBA support for drives larger than 137GB in Windows. For full details, carefully review the relevant article.

48-bit LBA Support for ATAPI Disk Drives in Windows 2000.
http://support.microsoft.com/default...b;en-us;305098

How to Enable 48-bit Logical Block Addressing Support for ATAPI Disk Drives in Windows XP.
http://support.microsoft.com/default...b;en-us;303013

Note: The above articles reference making necessary registry changes. It is strongly advised that you contact Microsoft directly for assistance.

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here is a list of other answers on the WD site that has to do with SIZE LIMITATIONS:

http://wdc.custhelp.com/cgi-bin/wdc....?p_cat_lvl1=81

anyone got any ideas?