How to edit the boot.plist?

[JennaDisagrees]

So my boot.plist looks like so:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
   <key>Kernel</key>
   <string>mach_kernel</string>
   <key>Kernel Flags</key>
   <string>cpus=1 -f</string>
   <key>Instant Menu</key>
   <string>Yes</string>
   <key>Hide Partition</key>
   <string>hd(0,3) [hd(0,3)]</string>
   <key>Timeout</key>
   <string>15</string>
   <key>device-properties</key>
   <string></string>

</dict>
</plist>


But the hide partition and instant menu don't seem to have any effect?

Can someone pleaseee help me out?  Thanks in advance. 

[Gringo Vermelho]

(disregard the edit - I hit the wrong button.. dangerous stuff these powers of moderation)

Remove the [ ] and it should work.