sbcl - how to get a REPL for a created thread?

Hi guys,
I am on SBCL 0.98/Linux and want to do one nice thing, but it seems
quite tricky :

I want to make a new thread, a then - either create a new slime buffer
with REPL talking to that new thread - or - having a normal REPL, call
some function which will connect to that thread, (also grabbing
output). after :quit, the function should quit to normal REPL (or close
slime buffer)

Is something like this possible? Having just that function will be
perfect, changing slime/emacs is too much for me, but if somebody
already did that...

Any ideas how to make such a useful thing?
Thanks,
Karol

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