I have the same problem, Visual Studio 2012 Ultimate, but nsight can’t find my installation. My registry looks ok, and devenv.com is located in the folder specified by InstallDir.
Unlike bartekh above, I have no Cuda templates in the new project wizard.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio1.0]
"UpgradeCheckScheduledTimestamp"=hex(b):70,84,0d,b8,d3,4b,cf,01
"Source Directories"="C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\crt\src\;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\crt\src\vccorlib\;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\atlmfc\src\mfc\;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\atlmfc\src\atl\;C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\atlmfc\include"
"InstallDir"="C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\"
"ApplicationID"="VisualStudio"
"ThisVersionDTECLSID"="{059618E6-4639-4D1A-A248-1384E368D5C3}"
"ThisVersionSolutionCLSID"="{7751A556-096C-44B5-B60D-4CC78885F0E5}"
"SecurityAppID"="{179CAEE3-011C-424A-9A43-011AB589A7CC}"
"StartMenuFolder"="C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Microsoft Visual Studio 2012\"
"ShellFolder"="C:\Program Files (x86)\Microsoft Visual Studio 11.0\"
"RestoreAppPath"=dword:00000001
@=""
"ConfigurationChanged"=hex(b):c0,8f,85,b7,d3,4b,cf,01
"SetupCommandLine"="/setup"
"SplashHash"=hex:01,00,00,00,d0,8c,9d,df,01,15,d1,11,8c,7a,00,c0,4f,c2,97,eb,\
01,00,00,00,94,51,b9,ba,d7,c1,82,4b,8e,5c,72,e0,d5,6b,ac,c2,04,00,00,00,02,\
00,00,00,00,00,10,66,00,00,00,01,00,00,20,00,00,00,47,d1,b6,33,e8,28,f9,8a,\
9e,9b,99,c5,21,99,97,e1,7e,11,94,41,0b,2a,21,22,3f,2a,17,70,b5,6e,c5,cd,00,\
00,00,00,0e,80,00,00,00,02,00,00,20,00,00,00,dd,ae,dc,ba,d1,a2,62,ae,8c,3d,\
3e,15,27,10,2d,f0,1f,e8,c4,14,1a,f2,f6,49,c4,ea,ff,6a,ad,f6,05,15,f0,00,00,\
00,7e,ab,b1,9a,e6,3a,71,b9,43,04,41,9b,1f,4d,f4,00,c9,da,65,f5,67,43,11,0d,\
a6,80,f1,1a,ff,be,fd,12,04,31,9d,92,62,f0,ff,1c,b1,d0,3c,62,9b,f0,5c,0f,be,\
c5,0b,93,24,8a,fb,07,27,e2,86,f0,1e,db,a8,3a,6b,90,e7,a5,5b,96,d8,ef,9d,71,\
94,c1,5a,c8,2a,dc,a2,7c,29,b7,6e,78,f6,23,20,af,5b,9e,ce,4d,bf,70,57,d2,21,\
05,f3,19,a2,d9,15,61,9e,c9,fe,fa,8a,c5,86,2d,3b,b0,8d,18,35,4b,3e,80,c0,03,\
50,85,53,88,27,fc,ef,a4,19,2e,1b,80,7c,2f,33,1f,c6,d6,bd,c0,b6,37,35,fc,35,\
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fe,0c,ff,9a,85,06,e3,b4,38,8b,54,c3,a6,b7,a5,0d,0c,20,d5,cd,c2,f4,03,d9,9c,\
16,09,bc,8c,93,13,01,8c,ee,ba,5e,58,90,d9,ed,20,7f,41,c9,d3,c2,e5,93,bb,e6,\
60,4f,b4,b3,e5,10,98,a8,69,0e,09,89,63,6e,68,ae,40,00,00,00,0f,74,35,8c,67,\
61,ea,ce,b9,38,e3,2b,95,1f,6a,4a,f3,a5,a0,9e,37,3b,aa,d5,e7,08,f9,df,77,3d,\
b7,76,a9,6f,ec,98,29,ff,3e,ee,0b,67,a8,72,e6,be,89,a3,cc,a4,87,63,76,8b,f7,\
9c,70,e6,36,6a,30,8a,0c,6a,09,04,00,00