[SDL] compiling a 32bit on a 64bit system

[Rodolfo Borges]

Dear SDL,

I use a x86_64 system (Red Hat Enterprise 3) at work.
I do not have root access, but I sucessfuly installed SDL with
./configure --prefix=$HOME/usr
It's working (but my old SDL game is behaving stangely, I'll have to
adapt it for the 64bit environment).

Now I want to work with the D language (http://digitalmars.com/d).
They have SDL binding (http://dsource.org/projects/derelict), but
currently D only works in 32bit.

So, I have to install a 32bit version of SDL.
Which configure options should I use to build a 32bit version of SDL,
on a 64bit system?
Can both versions co-exist?

Thanks in advance,

-- 
Rodolfo Borges