Comment out a fixme, it make a user mode crash (ntoskrnl\ke\exception.c:94 KiRaiseException ), after this viso installer start working, thx Christoph_vW  to found it.
Modified: trunk/reactos/lib/msi/msi.c

Modified: trunk/reactos/lib/msi/msi.c
--- trunk/reactos/lib/msi/msi.c	2005-10-09 22:35:41 UTC (rev 18390)
+++ trunk/reactos/lib/msi/msi.c	2005-10-09 22:35:54 UTC (rev 18391)
@@ -821,7 +821,9 @@
 INSTALLSTATE WINAPI MsiLocateComponentA(LPCSTR szComponent, LPSTR lpPathBuf,
                 DWORD *pcchBuf)
 {
-    FIXME("%s %p %p\n", debugstr_a(szComponent), lpPathBuf, pcchBuf);
+    /* This FIXME will crash some installer 
+	 *  FIXME("%s %p %p\n", debugstr_a(szComponent), lpPathBuf, pcchBuf);
+	 */
     return INSTALLSTATE_UNKNOWN;
 }