Acrobat or Digital Editions?

I purchased a copy of Adobe PhotoshopCS3-CIB from amazon.com.  I am able to 
read the book using Adobe Digital Editions (after some initial hassle!) but 
prefer using Acrobat 8 Pro.

Although the downloaded eBook file is in pdf-format, Acrobat does not seem able

to open it.

I also have (from an earlier download, cannot remember how) the same book in a 
zip file containing a welcom.pdf and files with the lessons. I can open the 
welcome.pdf using Acrobat 8 Pro, but cannot access the lessons.

Can I read this book with Acrobat?
If so, how?
Help is much appreciated.

-- 
Adriana

Acrobat 8 Pro and Adobe Reader 8 no longer have any facilities for
reading this kind of eBook. It is locked to Digital Editions (and,
too, locked to the one computer on which you purchased it).

There is talk in the Digital Editions forum of improving Digital
Editions, but I don't see any talk of this function rejoining
Acrobat/Reader.

> Acrobat 8 Pro and Adobe Reader 8 no longer have any facilities for
> reading this kind of eBook. It is locked to Digital Editions (and,
> too, locked to the one computer on which you purchased it).

> There is talk in the Digital Editions forum of improving Digital
> Editions, but I don't see any talk of this function rejoining
> Acrobat/Reader.

Thank you. I was not aware of there being a forum dedicated to Digital 
Editions.
Will go and browse there!

-- 
Adriana

What does the ebook supplier say it is compatible with?