Oscar,
I went ahead and changed the two lines in the CVS install document ( https://openacs.org/projects/dotlrn/dotlrn-doc/dotlrn-installation ) that were incorrect.
cvs -d :pserver:anonymous@dotlrn.openacs.org:/dotlrn-cvsroot login
(hit return for prompted for password)
cvs -z3 -d :pserver:anonymous@dotlrn.openacs.org:/dotlrn-cvsroot co dotlrn-core
Any other problems with that document?