See
www.dougknox.com, Win XP Tips, Advanced Registry Editing for
instructions on how to load the "kid's" portion of the Registry into REGEDIT
while you're actually logged on to your account.
Then go to the Registry key that you named in HKEY_USERS.
Example: HKEY_USERS\Kids1
Then continue down into this branch of the Registry until you get to:
HKEY_USERS\Kids1\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
(note this is only an example. Use the name you actually gave the Kids1 key)
In the right pane, right click in a blank area and select New, DWord value.
Name it DisallowRun. Then double click the value you just created and set
it to 1
Now, right click on the Explorer subkey in the left pane, select New, and
select Key. Name the new key DisallowRun. Highlight the key you just
created.
Right click in the right pane and select New, String value and name it 1
(that's the number one). Double click the new value you just created and
enter IEXPLORE.EXE
You can add more applications by incrementing the number of the value and
entering the name of the EXE file. MSIMN.EXE for Outlook Express, CALC.EXE
for Calculator and etc.
When you're finished, make sure you highlight HKEY_USERS\Kids1 (or whatever
you named it) and then click File, Unload Hive. Otherwise, an error will
occur when that user tries to log on to the computer.