[NTG-context] Instalation of minimal

Hi, Is information on this page http://wiki.contextgarden.net/ConTeXt_Minimals still valid? After following instructions and successfull (I think) rsync sessions I try: source ~/context/tex/setuptex ~/context/tex and I'm told ~/context/tex is not a valid TeX directory. I also tried downloading a 'linux.zip' from http://minimals.contextgarden.net/pragma and it says the same. It also complains about a missing 'plain.tex'. What is the easier way to install MK IV? I usually use ConTeXt that comes with Ubuntu, I just need MK IV in one session where I need to type unicode characters by their number. (A previous message from Hans says \char"2019 would work for sure in MK IV.) Thanks, Maurício