Garethman!!`

So you installed XP after installing Vista?

Use Vista Boot Pro, and after re-building the boot menu, it will be there It only doesn't mess with it, if you install Vista after XP.

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CPU: Intel Core 2 Quad Q9450 / AMD Athlon 64 X2 TK-53 1.70GHz
RAM : 8GB DDR2 PC6400 / 2GB DDR2-667 PC5300 A-DATA
HDD : 750GB SATA Seagate Barracuda/ Western Digital Scorpio 250GB 7200RPM
GPU : Radeon HD2900XT 512MB / Radeon Xpress 1150 128MB
OS : Windows Vista Ultimate x64 / Windows Vista Home Premium