Would someone please point me to the Beta Installation Thread that gives the instructions concerning installing Ver 2 over Ver 1.

I discovered Spybot 2 while I was removing a virus from my son's computer. It already had Spybot 1 installed when I installed Spybot 2. What is the Safer guidance? I am interestind in knowing if it makes any difference that both are on the system. Will Beta 5 or RTM remove the previous version?Should I uninstall Ver 1? etc. There is usually a Beta guidance document or moderator thread that covers this. Where is it? Thanks.