You'll find below the steps required to build and test Poshboard on a fresh OS (XP/Vista/2003/2008...) :
1) Install PowerShell here2) Install Silverlight 2 Client here3) Install Web developper Express 2008 SP1 with SQL EXPRESS 2008 options here4) Install Silverlight tools here5) Download and install AgDatagrid here6) Download poshboard 0.3.5 or above here7) Download visifire 2.05 or above, copy "SLVisifire.Charts.dll" and "visifire2.js" in the dropthings/xapfiles folder of poshboard here8) Open the project in web developper express (poshboard/dropthings.sln), build and test !