I am thinking of installing Zimbra after reading how good it is from Centos' website.

I have 2 questions:

1. Centos 4.2-x86_64
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Reading some of your forum posting, I am a little confused if it will run on my server which is running Centos 4.2-x86_64. I know you suppor RHEL 4 but do you support 64 bit?

If only 32bit is allowed, my server has 32 bit utils running along with 64 bit, Is it possible for you to list our the necessary 32bit software required?

2. MYSQL
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It say in the installation doc that it is not necessary but recommended that we shut down MYSQL. My server is currently operational and shutting down MYSQL will mess my users up. What are the likely problem I could encounter if I kept mysql running?

Thank you.