replace a tag with a new version

Say I have tags/current

In my trunk (or my wc), I've got newer/better "current" code.

How would you replace tags/current?

Is there a single step process for replacing a tag with a new version?

I tried copy/move with TortoiseSVN, but I can't see how you'd replace
tags/current without either merging up to it, or deleting it, and
recopying it. (No, I'm not asking for tSVN help, I'm using the command
line tools everywhere, just wanted to quickly test an idea.)

For reference: I'm storing a copy of my website in Subversion. I'd like
to be able to script an export of a "stable/current" release for
rsync'ing to my web server. I can't say that trunk will always be usable.

Should I just drop this line of thought and just be committing known
good stuff against "current"?

Would it be easier to just make trunk my stable/current version, and
just have a branch version that I'm constantly merging back into trunk?
(Seems like a lot of work.)

Mostly seeking pointers to ideas for handling this scenario. I can work
out the details, just want to see what's more natural(if there is such a
thing) for Subversion.

Thanks.

-- 
Andrew Thompson
http://aktzero.com/
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