Sorry!
Only just noticed your mail and I'm off home in a mo, so I'll just give a couple of quick details to see if this is what you mean.
Obviously, make sure you have MySQL loaded (MySQL 4 version). Create a database called something like 'vtiger4'.
MySQL probably won't have a password in it's default configuration so in the vtiger 'install.php' page, which you run after putting the vtiger files in the correct ibay, just list the SQL server as 'localhost:3306' and the user as root with no password, make sure you also list the database as the correct name, .i.e vtiger4, this takes me on to the next screen successfully.
Is this what you mean? (I'll give further details if neccessary although all this can be found on the vTiger site)
Good luck with it.