In MSN Messenger 7.0.0205 BETA there is no option available to disable the tabs to the right of your contact list. Of course, we can tell you how to remove the tabs anyway.

A] The manual removal method

1) Hit Start > Run and fire up regedit

2) Look for the section:

HKEY_CURRENT_USER Software Microsoft MSNMessenger PerPassportSettings

3) Open all the sections consisting out of a number combination.

4) Select the DWORD DisableTabs (if it is not present, create it by right-clicking, selecting New and then DWORD-value).

5) Double-click it and change its value to 1.

6) Repeat this step for all number combinations.

7) Close and restart MSN Messenger.

B] The automatic disabling method.

Download Tab Enabler/Disabler by Huuf.

C] The Hide Tabs checkbox enabler

Download Show "Hide Tabs" checkbox by Huuf