Make sure you are not in that database in the QA

Two reasons, the job may be doing the rollback or your job retry attempts set a non – zero value

Yes you are right, If it is SQL Authenticated then you don't need the Domain name. What is your Security mode configured on the other box? Just make sure its...

Yes both are same; Incremental is nothing but the Differential backup

While restoring the backup you need to change the Drive letters. Go to the EM-> Databases->Resotre Database ->From Device -> Choose the backup File -> and specify the database name->Go...

How are you connecting to the other server? Make sure you qualify the user with domain name\username. Also what is the security mode on the other server?

By default msdb set to simple recovery model, since we don’t take the log backups for msdb, we don’t need a full recovery model. Simple database recovery is nothing but...

Here is an Article By Joseph Sack on Trapping DTS Errors

http://www.joesack.com/DTSErrorTrap.htm

Executive is nothing but SQLServerAgent. If you are using distributed transactions (Calling the remote stored procs on some other SQL Server and Distributed updates) in your application you might want...

Here is a good Article form Brian

http://www.sqlservercentral.com/columnists/bknight/dtslockdown.asp

I guess you will have the option to check box to synchronize the data immediately or some thing like that while configuring the Rep

Very good Article on Moveing DTS Pack

http://www.sqldts.com/default.aspx?6,105,204,0,1

Go to http://www.Google.com and search for SQL DTS. Here is a very good site about the DTS Pack

http://www.sqldts.com

By default public role user can create/ Delete/ Execute the DTS packages. You need to explicitly remove the permissions to block them. Revoke the permissions on sp_add_dtspackage, sp_enum_dts_packages and sp_get_dtspackage...

No way you can install with a single click that includes your user database. If you have your DB backup or script as Antares said, install MSSQL and then restore...