CR for VS2008 (10.5/12.x)

Hi,

Now, my computer is installed CR basic (10.5) for VS2008 with CR framework (10.5) for VS2008 from http://scn.sap.com/docs/DOC-27942

I discovered having CR basic (12.x) and CR framework (12.x) there on web page http://scn.sap.com/docs/DOC-27917.

So, Am I possible to install CR basic (12.x) and and CR framework (12.x)  on one computer that was installed CR basic (10.5) and CR framework (10.5)

Thanks