you dont even have to do that just use reg entry to 'fake' that steam is installed.
Code:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Valve\Steam]
"SteamPID"=dword:00000000
"TempAppCmdLine"=""
"TempAppPath"=""
"InstallPath"="C:\\Program Files (x86)\\Steam"