Are you using one of the Automatic Payment Systems that are contained within the ebook? Or does the customer pay for the ebook before downloading the full ebook?
The reason I ask is if they download the full version after payment it makes sense to test heavily against earlier versions of IE. If you are using one of the self contained APS systems either the ebook will work or won't. The key advantage is if it doesn't work they won't be able to purchase the ebook, which means that your after sales help is minimized.
I only mention this in case you are not able to fully test your ebook against earlier versions of IE.
One possibility is to put the word out among your friends that you want an old computer. When someone upgrades their system there is little use for the old computer and in some states in the US it is not legal to put computers into landfills. This means there are people looking for someone to take the discarded system off their hands. Also, check the Goodwill and other donation stores. For little money you can have dedicated testing systems.
How to set up multiple versions of IE on ONE computer!
I did read through a mountain of tips and tricks at various fora. It seems that this has been a huge issue for web designers for some time! And it really should be a concern for eBook writers using AEC as well.
Just unzip each file into a new directory, and voila – the executable IE files you find there are actual standalone programs that you can run simultaneously with whatever you already have as part of your windows version.
The one problem with this is that the standalone versions takes on the name of the one you already have installed (like IE6.02) . Thus the IE specific “if IE X.Y. sniffer” will not work:
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