This helped me a lot!!!! The 2nd link deals with certificates!
http://interactive.linuxjournal.com/node/8017/print
http://www.linuxjournal.com/node/8095/print
http://www.linuxjournal.com/article/8151
Daniel D. Hesse
Technology Administrator
Methodist Manor Retirement Community
712-732-1120 Ext.116
dhesse@mmrcsl.org