With the EI you actually needed several .NET versions (according to the install doc). In the real world Avaya figured out, and is reflected in the CI install doc that you only need .NET 3.5, SQL Express 2005, J# etc. The entire install process shouldn't take you more than 20-30min.
Kyle Holladay
ACA-I, ACA Call Center, ACS-I, ACS-M, TIA-CTP, MCP/MCTS Exchange 2007
ACE Implement: IP Office
"Thinking is the hardest work there is, which is the probable reason why so few engage in it." - Henry Ford