Hi all just thought I would post a little explanation of how I got this working for the noobs among us (including myself)
First of all the "install page" link in the OP is a little inconspicuous. I didnt even realise it was a link until after I had spent 10 mins on the OCUK 'my basket' page looking for an "install page" !!
Install
To install go to the Install Page and drag/drop the green install link onto your bookmarks toolbar.
Anyway, once I found the install page I struggled to get this to work on IE8 using the instructions in the OP, as my browser would not allow me to drag and drop to my favourites list or my favourites toolbar.
The way I did it was to right click the green box and then select "add to favourites".
You then get a message saying the link may not be safe, do you want to proceed. Click yes.
Once it is in your favourites list it probably wont let you drag and drop to your favourites bar (mine wouldnt), so right click and select "add to favourites bar"
It should come up as: "OcUK shopping cart to BB-Code"
When on your OCUK basket and you have items in there, click the "OcUK shopping cart to BB-Code" tab in your favourites bar and copy the text from the window that pops up, and then paste it into your "reply" box on the forum. Preview the post to see if it has worked.
Hope this helps
Buff