Only two things change.
Firstly when u are restoring database, in the restore screen, select the file "From Device"... then select the file in new window. Click okay. Then in restore screen, click on the tick box next to the database name (eg. ASD_full) DONT CLICK RESTORE, u will get error. Click on options on the left side. Then select "Overwrite" option. Click okay.
Do this for all the databases.
Then when creating a3serial.
select SQL Authentication
login name: a3serial
Password = same as in guides
default databse= change to A3ItemEvent
THEN (this is part that changes for new sql software) Click on User Mappings.
Click on tick next to A3ItemEvent. Then in bottom of window select tick next to db_owner. Click okay. Done.
(might get error that user exists..... follow guide instructions)
the rest of the steps are same.
For any queries please be specific where u are having problem.
ALSO, i suggest u use 2005 sql, easier. 2008 is meh useless