using edit flags on reg keys ...

two quick questions ...

i was wondering if using editflags on my reg keys is the best way to secure that no other program hijacks the keys that i have written ... also should i enable all of them or can somebody recommend the ones that they use. i don't want my verbs to be editted and the commands with those verbs to be changed. will some installers freak out when they can't change key values?

heres a list (according to msdn):

0x00000001 - Excludes the file class
0x00000002 - Shows file classes, such as folders, that aren't associated with a file name extension
0x00000004 - Indicates that the file class has a file name extension
0x00000008 - Prohibits editing of the registry entries associated with this file class, the addition of new entries, and the deletion or modification of existing entries
0x00000010 - Prohibits deletion of the registry entries associated with this file class
0x00000020 - Prohibits the addition of new verbs to the file class
0x00000040 - Prohibits the modification or deletion of canonical verbs such as open and print
0x00000080 - Prohibits the deletion of canonical verbs such as open and print
0x00000100 - Prohibits the modification or deletion of the description of the file class
0x00000200 - Prohibits the modification or deletion of the icon assigned to the file class
0x00000400 - Prohibits the modification of the default verb
0x00000800 - Prohibits the modification of the commands associated with verbs
0x00001000 - Prohibits the modification or deletion of verbs
0x00002000 - Prohibits the modification or deletion of the DDE-related entries
0x00008000 - Prohibits the modification or deletion of the content type and default extension entries
0x00010000 - Indicates that the file class's open verb can be safely invoked for downloaded files
0x00020000 - Prevents the "Never ask me" check box from being enabled. The user can override this attribute through the File Type dialog box
0x00040000 - Causes the file class's file name extension is always shown, even if the user has selected the "Hide Extensions" option
0x00100000 - Prohibits the addition of members of this file class to the Recent Documents folder

also, one last question about reg keys ... can you create right-click context menu sub-menus without creating a shell extension. i would like to create something like what winzip does ... i t has options like "Extract to here" and "Extract to folder" in a sub menu. i know winzip uses a shell extension, but can i create that effect with just regular reg keys. thanks for any help ...