Heres an update to the OP for ver 1.8 of RM Clock. Did it off memory so if somethings not right let me know and I'll change it.
1.) Download RightMark CPU Clock Utility (RMClock, current ver 1.8) from http://cpu.rightmark.org/
and Prime95 from http://www.mersenne.org/freesoft.htm
2.) Unzip the programs to the directories of your choice (I use /program files/rmclock/ and /program files/prime95/).
3.) Launche Prime95.exe, download and begin calculations, minimize the window (you should see a red icon in your system tray), then launch RMClock.exe.
4.) Click on the "General" tab and note your default voltages (mine are "Startup" and "Minimal" at 0.988V and "Maximal" at 1.308V).
5.) Click on the "Management" tab.
6.) Select the "Use P-State Transitions (PST)" box. Intel 855 and 915 chipset users may need to select "Run HLT command when the system is idle" (I did). Do not select or modify any other options.
7.) Click on the add button to add your lowest and highest FID's to the box(your lowest and highests FID's can be found out by looking at the general tab under max and min) Be sure the "auto adjust intermediate p-state VID's" is checked, this will let the program interpolate the voltages inbetween your min and max.
8.) Change "AC Profile"("Battery Profile if your on battery power" to "Maximal" and click the apply button.
9.) Now click on the "General" tab and ensure that "Actual Clock" is your maximum processor operating speed (1995.16 Mhz in my case). Return to the "Management" tab.
10.) Decrease the "Maximal VID" (1.308V in my case) by one stepping and click the apply button.
11.) Ensure that Prime95 is still running without any errors. An error will look something like this: "FATAL ERROR: Rounding was 0.5, expected less than 0.4" or "Hardware failure detected, consult stress.txt."
12.) If you do not encounter any errors after a few minutes, return to RMClock and decrease the "Maximal VID" by another stepping.
13.) Continue decreasing the "Maximal VID" and checking Prime95 until you encounter an error. Make sure to press the apply button with each change.
14.) Once you encounter an error, raise the "Maximal VID" by one stepping.
15.) Then allow Prime95 to run for a few hours. If you receive an error, increase the "Maximal VID" by another stepping and run Prime95 for a few hours until you do not encounter any errors.
16.) If Prime95 runs for a few hours without encountering any errors, you have determined the lowest possible CPU voltage at maximum processor speed (1.068V in my case). Write this number down!
17.) Now change "AC Profile" ("Battery Profile" if your on battery power" to "Minimal." Repeat steps 9-15, except for "Minimal VID" instead of "Maximal VID."
18.) If Prime95 runs for a few hours without encountering any errors, you have determined the lowest possible CPU voltage at minimum processor speed (0.700V in my case). Write this number down!
19.) Right click the RMClock system tray icon and select "Run Automatically at Startup" and "Start Minimized to Tray."
Now you can change the profiles if you wish. I have mine to automatically manage on AC power to keep temps down, and minimal while on battery to maximize battery life.