I follow a very nice Facebook Page called: Mac OS X Tiger PPC and they post useful material that I felt obliged to share with you here.
They basically show that we have printer drivers installed that we don’t use, which can be found in Hard Drive/Library/Printers. Carefully remove the folders for printers that you don’t use and you will likely save over 1GB of hard drive space!
A second tip to maximize your system is an application called IceClean, which is a powerful system maintenance and optimization tool using UNIX built-in System.
* IceClean 3.4.8 – PowerPC friendly – 10.4 (Tiger) / 10.5 (Leopard) – Powerful and simple – http://www.macdentro.com/MacDentro/Home.html