Before you do any more work, make sure that your work is protected by putting it all into cvs. The cvs add command is not recursive, so you'll have to traverse the directory tree manually and add as you go. (More on CVS)

[service0 xml]$ cd ..
[service0 doc]$ cd ..
[service0 www]$ cd ..
[service0 myfirstpackage]$ cd ..
[service0 packages]$ cvs add myfirstpackage/
Directory /cvsroot/service0/packages/myfirstpackage added to the repository
[service0 packages]$ cd myfirstpackage/
[service0 myfirstpackage]$ cvs add www
Directory /cvsroot/service0/packages/myfirstpackage/www added to the repository
[service0 myfirstpackage]$ cd www
[service0 www]$ cvs add doc
Directory /cvsroot/service0/packages/myfirstpackage/www/doc added to the repository
[service0 www]$ cd doc
[service0 doc]$ cvs add *
cvs add: cannot add special file `CVS'; skipping
cvs add: scheduling file `admin-guide.html' for addition
cvs add: scheduling file `bi01.html' for addition
cvs add: scheduling file `data-model.dia' for addition
cvs add: scheduling file `data-model.png' for addition
cvs add: scheduling file `design-config.html' for addition
cvs add: scheduling file `design-data-model.html' for addition
cvs add: scheduling file `design-future.html' for addition
cvs add: scheduling file `design-ui.html' for addition
cvs add: scheduling file `filename.html' for addition
cvs add: scheduling file `index.html' for addition
cvs add: scheduling file `page-map.dia' for addition
cvs add: scheduling file `page-map.png' for addition
cvs add: scheduling file `requirements-cases.html' for addition
cvs add: scheduling file `requirements-introduction.html' for addition
cvs add: scheduling file `requirements-overview.html' for addition
cvs add: scheduling file `requirements.html' for addition
cvs add: scheduling file `sample-data.html' for addition
cvs add: scheduling file `sample.png' for addition
cvs add: scheduling file `user-guide.html' for addition
cvs add: scheduling file `user-interface.dia' for addition
cvs add: scheduling file `user-interface.png' for addition
Directory /cvsroot/service0/packages/myfirstpackage/www/doc/xml added to the repository
cvs add: use 'cvs commit' to add these files permanently
[service0 doc]$ cd xml
[service0 xml]$ cvs add Makefile index.xml
cvs add: scheduling file `Makefile' for addition
cvs add: scheduling file `index.xml' for addition
cvs add: use 'cvs commit' to add these files permanently
[service0 xml]$ cd ../../..
[service0 myfirstpackage]$ cvs commit -m "new package"
cvs commit: Examining .
cvs commit: Examining www
cvs commit: Examining www/doc
cvs commit: Examining www/doc/xml
RCS file: /cvsroot/service0/packages/myfirstpackage/www/doc/admin-guide.html,v
done
Checking in www/doc/admin-guide.html;
/cvsroot/service0/packages/myfirstpackage/www/doc/admin-guide.html,v  <--  admin-guide.html
initial revision: 1.1
done
(many lines omitted)
[service0 myfirstpackage]$