I just got a HP 6910p, I am now resizing the vista partition to make way for linux. Unlike the HP dv6000, this Vista on HP 6910p didn't want to resize as much as I wanted. It only gave me 7mb, despite following the workarounds listed here:
Nothing worked PowerDefragmenter, Auslogics Disk Defrag, PageDefrag, diskpart.exe, etc. I finally went on to just use gparted as documented here:
Fortunately for me vista just fdisk itself and I didn't need to use the recovery disk, which I left in the office. I used gparted live cd 0.3.4-11
Now time to install gutsy...