Personally I would not let anyone on MY PC, I'd rather get them their own.
We are only 3 here, each with their own PC, and I have a few extra PCs as well.
I dont' really have that experience, as I strictly work on 1-person PCs, where each user is also the administrator.
My wife and daughter are both well 'trained' and won't install anything themselves.
I assume that installing in Safe Mode as Admin would be the best way.
Anyway, here's what I found on the web:
During installation, some applications prompt you to install on the current user account or on all user accounts. If the application is not selected to install on all user accounts, the application does not show up properly.
The application may be installed, but the shortcut to the application may simply be missing from the new user account. Use these steps to copy the shortcut for all users.
Log on to the user account that has administrator access.
Open Windows Explorer.
From the Windows XP default Start menu, point to All Programs, Accessories, and then click Windows Explorer.
From the Windows XP classic Start menu, point to Programs, Accessories, and then click Windows Explorer.
In the My Documents window, click the plus sign (+) next to My Computer, Local Disk (C
, and Documents and Settings.
Click the plus sign (+) next to the name of the user account that the program is installed on.
Click the plus sign (+) next to Start Menu, and then select Programs.
Select the shortcut for the application that you want to add to another user account. Click Edit, and then click Copy.
Click the plus sign (+) next to the name of the user account that needs access to the application or the "All Users" account to give all users access to the application.
Click the plus sign (+) next to Start Menu, and then select Programs.
Select the directory that you want the shortcut to appear in. Click Edit, and then click Paste.
Repeat for each additional user who needs access to the application.
Select the setup installation file of the application. Click File, and then
click Run as.
Have the user who has administrative rights type the user name and password,
and then click OK.
Go through the installation of the application.
Note: Some applications require an administrator account in order to be
used. If a non-administrator account is used, the application does not work
even if it is installed properly.
For more information about applications not creating shortcuts for all user
accounts, reference Microsoft Knowledge Base article Q301494.
http://support.microsoft.com/default.aspx?scid=kb;en-us;301494
As for the dial-up connections, click "Anyone who uses......." option in tte
settings