Towards the right side top is a box stating " Recommended Add-Ons". Click on it and then select "IeSpell" - this will load the installation file > save to your desktop > double click to install the program.
You can now check the spelling of your posts (some members may find this very useful !)
To use it just click on Tools on the IE7 Menu Bar and select ieSpell - highlight the entries in your post and voila it will check the spelling.
freaky-- All the time I have used this product, and I have never realised that it had an English/English version. Now for a little experimental lesson, and see what I find.
Cymro-- Found that ieSpell was better (in my opinion) than Spellchecker, and the 'abc' at the top toolbar works without being obtrusive. Like all products though, everyone to their own choice that suits us the best.