install/remove in XP/SAVE MODE

[1] In XP SAFEMODE
[2] c:\>REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\MSIServer" /VE /T REG_SZ /F /D "Service"
[3] c:\>net start msiserver

[4] you can install/remove msi in xp/save mode