MSI install hangs in task sequence

Hi All, 

Im currently building lots of packages that will eventually be slipped into the build process for Windows 7.  

I have an issue with a package I have created for Adobe Reader. If i run the command line manually it works fine on my win7 build: 
msiexec /i "AcroRead.msi" ALLUSERS=1 /qb /norestart TRANSFORMS="AcroRead.mst" 
I created a package and created the distribution point, then added to my Task Sequence. The install starts but just hangs during install.  
Few questions:- 

1) Which package is best created for MSI installs via command line; standard package or by defination? 

2) Is there any way to run the task sequence manually so that I don't have to rebuild the machine just to test the package? 
  
3) If I update the command line of my package do I have to update the distribution point? 
  
Thanks