As a matter of the fact, Jobs and DTS packages are stored in the MSDB dtatabase. You can use free DTSBackup 2000 from http://www.sqldts.com/default.aspx?242 to backup or transfer DTS packages. The Jobs can be scripted from EM.

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>My question is not at the databases level, I've covered those fields by fields. I'm more concerned about the instance level.
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>DTS and jobs seems to be stored at the master db level. I'm sure that rebuilding whould drop everything....
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>I cannot see how to backup those (dts and jobs) since they are part of master.