2016-07-30, 10:14
Ya you just replace the shell value in the registry:
Key: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Name: Shell
Type: REG_SZ
Value: C:\path\to\your\executable.exe
Key: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Name: Shell
Type: REG_SZ
Value: C:\path\to\your\executable.exe