One easy way is to create a batch file

In the batch file enter

regedit /f /s regfile.reg

the batch file can just be published as a standard package or application.

while the /f isn’t necessary, it does force an overwrite of any pre-existing keys and so can be useful if you want to correct some keys rather than simply adding them.

Below is a quick summary of what’s new with R3. Go here to download the evaluation software.

Centralized Power Management

Configuration Manager R3 lets IT organizations centrally manage the power settings of Windows 7, Vista and XP computers, helping reduce energy consumption and costs. You can plan and apply a power management policy for high and low PC usage periods, monitor user activity to avoid any productivity interruptions and correct non-compliance. Detailed reports of trends and settings help you make smart power management choices, and also validate Green IT projects with summaries of power, money and CO2 savings. Learn more here.

Mobile Device Management

Configuration Manager R3 includes licenses for the popular System Center Mobile Device Manager, so you can run comprehensive asset inventories, deploy software, manage settings and enforce password policies for Widows phones.

Enhanced Scalability and Performance

Configuration Manager R3 is more scalable than ever, increasing the number of supported clients to 300,000 per site. R3 is also more efficient in the way it communicates with Active Directory, helping you discover user or machine changes more quickly and allowing custom queries to define user, system or group attributes

Read more about SCCM 2007 R3 here.