Ok, been trying to get it on my own, but the same set of errors plague me when I try to install.
Yesterday it caused me great greif and I decided today to start fresh and removed/zapped anything and everything I had created while reading the install directions. No luck. Anyways onto details about what I did.
Its Windows 2000 Advanced Server (on a laptop), Using IIS v5, ASP.Net 1.1 (verified in IIS), and SQL server 2000.
First I am using the source zip file not the install one. I unzipped it and now I just copy them over to the web directory. I am using "dotnetnuke" as the directory under wwwroot. Next I give ASPNET full access to that directory. Then in IIS I make it a new virtual directory "Eos".
Now in the SQL Enterprise Manager, I create a new database "Tome" and the computer profile that I created "Eos" is the database user I assign to the "Tome", using Windows Authentification. I give it everything except db_denyread/write or whatever those 2 are.
In web.config I change the db_owner (one of the last steps in the installation) to "Eos" to match what I did in SQL and for Windows.
The connection string I use is:
key="SiteSqlServer" value="Server=ezlbeth;Database=Tome;uid=Eos;pwd=Eos;"
The error I am getting at the moment is
DotNetNuke Upgrade Error
assembly version doesn't match databaseversion
login failed for user 'Eos'
The other error I have been getting when I change the connection string to have (local) replacing ezlbeth in the above, is
Could not connect to database specified in connectionstring for SQLdataprovider.
Unless I missed something obvious I think its something in web.config or SQL server that I am missing. The permissions are set to "yes" for just about everything else, and those are the only 2 things I am still a bit flakey on setting up 
Anyways, I'll keep fiddling and thank you for reading and for any help you can give about this. I'll also be browsing this forum (again....) hopeing there is something I missed.
[Edit to add:] Am using DotNetNuke 3.2.2