Where can I find XP x64 drivers for Portege R500 - hotkey / power management?

Question

Where can I find downloads that will enable power management or hotkey support for my Portege R500?
I have already installed drivers for everything except fingerprint reader (don't want), tpm (really don't want), and hdd motion sensor (tos620a) (not bothered about right now). Most drivers are latest from original vendor websites, or, failing those, from Toshiba's Vista 64-bit download areas.
Everything else generally works: wifi, graphics & chipset, sound, lan, bluetooth stack, cardbus, card reader, etc.
However, having done this, the following issues remain:
FN hotkeys don't work for suspend to ram, suspend to disk, *screen* *brightness* - essential to extending lifetime; FN hotkeys for numeric/direction pad, external monitor toggle *do* work
Dedicated backlight toggle button doesn't do anything
However, in order to get battery lifetime beyond ~2.5 hours and closer to the rated 7.1 hours, I'll need to turn some things down / off occasionally. What software can help and where can I get it, such that it works on Windows XP x64 edition?
Note:
I have tried the xp 32-bit packages that Toshiba supplies, they don't appear to work on x64. The 'ctrls' package requires 'cmod', but 'cmod' gives this error:
TOSHIBA Common Modules Setup
Not an ACPI machine. Cannot install TOSHIBA ACPI Logical Device.
OK
I have tried the xp 32-bit package called 'pwrsav'; it installs a bad help link to my start menu, and adds a couple of exes, tpsmain and tpsoddctl, to my auto-runs. These 32-bit executables quit immediately after execution.
I would have tried to install Toshiba's Vista 64-bit packages for hotkeys / common modules / power management, but the only one of the three I can find via toshiba.co.uk are common modules, and unfortunately that zip file only contains .inf, .cat and .sys files, no installer.
Motivation:
I'm using a fresh install both because the default Vista install is unusable (900MB memory used on a fresh boot desktop, drive split into multiple partitions, trial, adware and broken software installed left and right)
I'm using x64 because I'm a software engineer whose next product needs to work on x64, and this new laptop was a likely first candidate

Answer 1

You didn't link to the tool you found. If you meant this tool then, you should be aware it doesn't work on x64 on R500:
Display Tuner
Cannot detect monitor!
Your monitor does not support DDC control or your videocard is not supported by Display Tuner.
You cannot use Display Tuner in this configuration.
OK
It would be unlikely to work in any case, as display driver brightness isn't normally the same as the screen's brightness (hence power usage).
Maybe it's a communication issue, but I *have* found +original+ drivers for all essential components, just not for things like screen brightness - something that, to be honest, I more expect to be handled in firmware / bios, as that's been my experience on previous laptops, and is more reliable in any case, considering I could be running an oddball Linux or a completely different OS, or a CPU-intensive high-priority task.
The R500 series seem to be scrimping on the firmware and expecting OS utilities and dedicate yet another system tray icon to take over that job.
It does look like x64 is a no-go for mobile use on this machine, due to lack of firmware power management, which is a great pity as the point of such a light machine is mobility. I'll wipe it and install XP 32-bit and see how that goes.