Install/Uninstall OS X Tiger components

I realise that I can uninstall a compononent of OS X
like iCal by dragging it into the Trash. But then is
there a way to just re-install iCal if I realise that
I need it and I have emptied my trash? Coming from a
windows user is there a way to install/uninstall
components of OsX e.g. is there way a to uninstall
OSX's language support and reinstall later?

The mac does not have an equivalent add/revove software control panel that is found on windows. This is because it is not needed on a mac as you can normally just drag an app to the trash when you want to remove it. There are no dll's to amend or registry entries to amend etc.

That being said to reinstall individual apps from your tiger install disk you need to use a 3rd party utility called Pacifist or diggging around the disk in your terminal. Pacifist is the easier method.

To uninstall languages you don't need, use Monolingual.

Tim,

Do we really need Pacifist?

Normally, I just go to the install DVD and inspect the package contents to find the app installer that I need. Perhaps that creates risks that Pacifist mitigates or maybe Pacifist makes things a little easier (I confess to being too lazy today to go and learn about Pacifist on my own).

So -- barring a possible objection from Tim (to whom I'll defer), you can simply pop the installation DVD into the drive and look in the "System" folder for installation packages. Right-click on one that looks promising and choose "Show Contents", and dig around for the package for the specific app you need. Double-click on it and you should be good to go.