A. This is as much a "religious" debate as a technical one. Both products are good (as are others such as DB/2, Informix, Sybase...). My advice would be to stick with whatever you have the technical skills/experience with, and don't change for...
A. The probable reason for this is that you're still on 6.5 and below. With this setup you can only shrink a database back to the last portion of log. So if you defined a database as 400Mb data, 100Mb log you can never shrink it. ...
A. You are trying to install SQL 7 Enterprise Edition on an ordinary copy of NT Server. You can only install SQL 7 EE on NT EE.
This may be due to you getting a mis-labelled set of MSDN disks.
A. For SQL 6.5 and below this is held in <dbname>..sysprotects.
For 7.0 and above <dbname>..syspermissions.
A. For SQL 6.5 download the PTK from http://support.microsoft.com/download/support/mslfiles/PTK_I386.EXE
For SQL 7 look on the CD under \devtools