Check the dependencies of you package

eups list -D ip_isr 666

Find the minimal change set and update your eups table. Verify it works

setup -r .

THIS IS VERY IMPORTANT - COMMIT YOUR CHANGES!

svn commit

Then you do the svn commands:

svn copy svn+ssh://svn.lsstcorp.org/DMS/ip/isr/trunk svn+ssh://svn.lsstcorp.org/DMS/ip/isr/tags/3.3.4

If you have screwed things up...

svn delete svn+ssh://svn.lsstcorp.org/DMS/ip/isr/tags/3.3.4

Do not tell anyone you did this.