So Shockwave Flash Object does not appear in All Add-ons?
What files do you have in C:\Windows\system32\Macromed\Flash ?
Everything that is required is there, so I do not understand why the add-on does not appear in IE8.
On Monday I will have access to a machine that still has IE8; I will then check a few things.
I have actually been able to resolve this problem....eventually.
I used the adobe Flash remover program, rebooted, deleted the windows\system32\macromed/flash folders. Reset IE8, but this time also removing all personal settings as well.
Re-installed Flash and hey-presto shockwave appears as an add-on..
Thank you for your help and interest.