all is not lost.

First thing you need to do is to max out the RAM on that machine. The early 2006 will run 2GB of RAM while the late 2006 will take 3GB.

Depending on what part of 2006 your machine is, there were two 2006 models, you can upgrade that machine to OSX Version 10.6.8 (Snow Leopard)(Early 2006) or 10.7.5 (Lion)(Late 2006)

How you get there is completely dependent on how your machine behaves. The cheapest route is to purchase the Snow Leopard upgrade (around $20) and see if your machine will accept it. Apple says that to use the SL upgrade disk, you must have Leopard installed, but many users have found that they can go straight from 10.4.11 to 10.6 easily.

Snow Leopard will also update your browser (Safari) and allow you to update the rest of your apps.

To find out if you have an early or late 2006 model, go to the Apple site: and enter your serial number in the field provided.

Hope this helps