CTP3 and PowerShell Community Extensions PSCX

I'm testing CTP 3 on Vista Ultimate in a Virtual Box.
Currently the only installed addon is PSCX 1.1.1.
To avoid some error messages I removed some of PSCX alias definitions,
for example all of the debug stuff.

I see no real clashes. Only there are 2 different commandlets Start-Process.

How to use a specific on of them
What are the differences between them
Does elevate based on Start-Process works with the CTP3 version as well.