Hi Melanie!

I have done some research for you and dug up this info:

region flag               meaning
0x00000001                Allow damage (llSetDamage() will work)
0x00000002                Allow landmark creation (region-wide)
                          (this will turn on the menu option)
0x00000004                Allow set home (region-wide)
                          (this will turn on the menu option)
0x00000008                When teleporting from here, set the home position
                          to the teleport destination (Orientation island)
                          (this is set from god tools window)
0x00000010                Region sun is fixed
0x00000020                Region is free of all charges/taxes
                          (this applies to tier charges, not used in viewer)
0x00000040                Region doesn't allow terrforming
0x00000080                Region doesn't allow land sale
0x00000100                Region is a sandbox (wipe all content at 0:00)
0x00000200                Draw region tiles in world map view even if the
                          map is too small (sets the draw threshold to 2 pixels)
0x00000400                Not used in viewer (disable all agent interaction)
0x00000800                Not used in viewer (purpose unknown)
0x00001000                Disable collisions (Estate settings)
0x00002000                Disable scripts (Estate settings)
0x00004000                Disable physics (Estate settings)
0x00008000                Region can't be seen into from neighbors
0x00010000                Deprecated visibility flag for mainland (commented in viewer)
0x00020000                Allow public access
0x00040000                Don't count traffic
0x00080000                Block flight
0x00100000                Allow direct teleport
0x00200000                Estate level script disable
0x00400000                Block push
0x00800000                Deny no payment info on file
0x01000000                Deny payment info on file
0x02000000                Deny payment info used
0x04000000                Allow parcel join/divide
0x08000000                Send abuse reports to estate owner email
0x10000000                Allow voice
0x20000000                Block "Show in search"


Predefined estate IDs
1                         Mainland
2                         Orientation islands
3                         Linden internal
4                         Showcase
5                         Teen grid

Please note that the menu items are enabled and disabled on the estate level,
but the functionality is enabled through parcel flags. That means you may have
the menu option available, but get a message that you're not the parcel owner
when you try to use it.