Multiple LyX side-by-side

[venom00]

Hello, how can I run multple versions of LyX side-by-side? I want to run LyX 
2.0 alpha 5 and the latest of the 1.6.7 series without having to reconfigure 
the user folder each time. Is there a command-line parameter to instruct LyX to 
use a particular folder instead of another? Or maybe some registry key?
BTW, when is the release of the sixth 2.0 alpha planned?
 
Thanks in advance,
Ale