The reason I am asking is that they have different backup and restore utilities. We use SharePoint Portal Server which have a backup and restore program which makes it relatively easy to back up the whole portal site. I never had to move our portal site before but I did run a test some time back to make sure that my daily backups does restore, should the server fail or data get corrupted.
The first step will be to make sure that you do have a backup of all your sites. (One should backup on a daily basis).
Second step is to install and configure the SQL server, unless it is currently running on a different server and is going to stay on that server.
Next will be to install and configure SharePoint Services. After that you restore your backup onto the new server and install Insight Server. Lastly you will have to edit the searchscope file so that it points to the new server.
