How to bypass the restrictions Windows 7 RC upgrade directly to RTM

Although Microsoft officially claims that Windows RTM does not support direct upgrade installation from the RC version, when users run the RTM installer directly on the RC version, they will find that the upgrade installation option is not available, only the custom installation method can be used, and the original system The files will be moved to a Windows.old folder. But in fact, this is just a "scared" argument, because the method of cracking the restriction already exists, and Microsoft has been ignoring the existence of this method, it seems to acquiescence to this modification.
Maybe someone has already thought of it, yes, just like the way to upgrade from Beta to RC, modify the cversion.ini file in the installation image. Many people have successfully upgraded to Windows 7 RTM using this method. The specific method is as follows:
Unpack the downloaded ISO image file;
Enter the "sources& rdquo; directory;
Edit with arbitrary text Open the "cversion.ini" file;
change the 7233.0 in the second line "MinClient=7233.0" to the RC version number 7100.0, save and close the editor;
but here is still reminding everyone Although this method can be used to upgrade Windows 7 RTM directly based on the RC version, there may be some uncertainties that may cause some unexpected situations in the future. Therefore, it is not encouraged to upgrade the installation directly. Presumably, this is also a limitation of Microsoft. The original intention.