Install WM + upgrade OS or... vise versa?

[Richard T. <Ric...@rp...>]

I'd just like to thank everyone for all of their great support in this list.
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After running Webmin on two of our production servers here (and having
proved to my boss how great it works), I have been given the O.K. to get
Webmin loaded on six additional production systems.

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One question:  Some of the other machines are running old versions of RedHat
(5.x).  If I install Webmin now and upgrade the operating systems to 6.2 in
a few weeks, would I need to re-install Webmin again?

What do you recommend?

Thanks.
Richard T.