Troubleshoot PowerShell Script during OSD

I am very new to SCCM OSD. I've been doing MDT OSD for some time, and I can generally figure MDT issues out.

We're in the middle of setting up the SCCM 2012 SP1 environment. MDT has not been integrated. The contractors that are assisting have already built and tested several task sequences. I'm trying to troubleshoot a script but I'm having a hard time getting anywhere.

I have 2 questions:

1. Is there any way to show the Windows shell during OSD?
2. Is the tsenv: already created, or do I need to use "New-Object -COMObject Microsoft.SMS.TSEnvironment"