more CMSSW cvs

some more examples: using tags and checkout to a directory:

cvs tag -R -r "my_tag" ./Tutorial/MyPackage

mkdir ./Tutorial
cvs co -PA -r "working_with_CMSSW_1_3_0" -d ./Tutorial UserCode/gerbaudo/Tutorial

N.B. the "A" flag is essential, otherwise you'll be stuck with sticky tags and you won't be able to commit changes...