Very nice guide!
It needs to be modified a bit though: Jimmy2004 is right, do not disable the Task Scheduler service as it will turn off prefetching and slow things down. Distributed Link Tracking Client should be switched to Manual if using NTFS.
There are also other services that can be disabled as well in addition to whats mentioned in the guide, i have them turned off on my PC, read the description and see if you actually need them:
Alerter Service
ClipBook Service
Messenger Service
NetMeeting Remote Desktop Sharing Service
Network DDE Service
Network DDE DSDM Service
Network Location Awareness (NLA) Service (turn this off if you have Firewall/ICS service disabled)
NT LM Security Support Provider Service
Portable Media Serial Number Service
Routing and Remote Access Service
Server Service
SSDP Discovery Service
Telnet
Terminal Services Service
Also, i left IPSEC Services Service on Manual but i read it could be disabled.