The file is part of the SPI package - however it is called vmspiomwsetup.msi (without the number '8')
Apologies if our Guide is wrong on that point - I'll get it updated.
Also - please note we have released an update, the latest version is 5.0.2 - I'd recommend you download that package for your eval. It's on veeam.com now.
Hope that answers your question!
Vice President, Product Management