问题一：
Installing .NET Framework Runtime 4.0: D:安装包CADcad2012(x64)Map3D2012(x64)3rdPartyNET4wcudotNetFrameworkdotNetFx40_Full_x86_x64.exe
Install .NET Framework Runtime 4.0 Failed Installation aborted, Result=1603
原因是计算机已经安装了.NET 4.0（如系统自带或安装其他软件时自动安装），安装CAD时重复安装就会出错，解决办法为：
打开安装文件夹中的“Setup.ini”；
在DOTNET BEGIN到DOTNET END之间每个.NET版本安装完后加上“IGNORE_FAILURE=YES”，表示安装失败时忽略，并保存：
#============= DOTNET Begin ===============
[DOTNET4]
PLATFORM=ALL
PRODUCT_NAME=.NET Framework Runtime 4.0
EXE_PATH=3rdPartyNET4wcudotNetFrameworkdotNetFx40_Full_x86_x64.exe
EXE_PARAM=/q
VC_FUNC=DotnetVerify
VC_SOURCE=SetupSetupUi.dll
VC_PARAM=.NET Framework 4 Full
VC_DESCRIPTION=Detecting .NET 4.0 Runtime
DISKCOST=80000000
IGNORE_FAILURE=YES
[DOTNET4LANG]
PRODUCT_NAME=.NET Framework Runtime 4.0 Language Pack
EXE_PATH=3rdPartyNET4wcudotNetFrameworkdotNetFx40LP_Full_x86_x64_%lang%.exe
EXE_PARAM=/q
EXE_LANGS=1036;1040;1031;1034;1046;1041;1042;2052;1028;1029;1038;1045;1049
DISKCOST=3000000
IGNORE_FAILURE=YES
[DOTNET35SP1]
PLATFORM=ALL
PRODUCT_NAME=.NET Framework Runtime 3.5 SP1
EXE_PATH=3rdPartyNET35SP1wcudotNetFrameworkdotnetfx35.exe
EXE_PARAM=/q /lang:ENU /norestart
VC_FUNC=DotnetVerify
VC_SOURCE=SetupSetupUi.dll
VC_PARAM=.NET Framework 3.5 SP1
VC_DESCRIPTION=Detecting .NET Runtime 3.5 SP1
DISKCOST=80000000
IGNORE_FAILURE=YES
ACTION=INSTALL
[DOTNET20]
PLATFORM=NATIVE
PRODUCT_NAME=.NET Framework Runtime 2.0
EXE_PATH=3rdParty\%platform%NET2NetFx20.exe
EXE_PARAM=/q:a /c:"install.exe /q"
VC_FUNC=DotnetVerify
VC_SOURCE=SetupSetupUi.dll
VC_PARAM=.NET Framework 2.0
VC_DESCRIPTION=Detecting .NET 2.0 Runtime
DISKCOST=80000000
IGNORE_FAILURE=YES
[DOTNET]
PLATFORM=ALL
PRODUCT_NAME=.NET Framework Runtime 4.0
EXE_PATH=3rdPartyNET4wcudotNetFrameworkdotNetFx40_Full_x86_x64.exe
VC_PARAM=4.0.30319
VC_DESCRIPTION=Detecting .NET 4.0 Runtime
IGNORE_FAILURE=YES
#============= DOTNET End ===============
问题二：
解决办法，很明显，提示缺少
Microsoft Visual C++ 2005 SP1 Redistributable Package (x86)
下载并安装：http://www.microsoft.com/zh-cn/download/confirmation.aspx?id=5638