postgresql & Debian

Hi there,
I'll begin admitting I'm quite a novice **both** in pgSQL and Linux OS. :)

Besides that, I tried to install PG on my Debian (Potato) GNU/Linux PC
(x386) and, after very little troubles, worked fine.

When I tried to create a table with a foreign key, I found F-keys are not
implemented in PG 6.5.3 but only in 7.x. Good. Download the source. Make &
Install. At last it worked.

Now I have a postgreSQL 7.0.2 up and running, but I can't create the
language PL/PERL due to the fact that libperl is not a shared library.

I have been discouraged regarding the obvious solution of recompiling the
perl library by a friend who told me that doing so I'll probably crash the
system, but I can't see any way to solve this problem.

Now the questions:

Is it true? Is it really (so) dangerous to recompile libperl as a shared
libary?
Is there another way to have PG using PL/PERL?
Is it possible havig two libperl installed (shared and static) at the same
time?
Any smarter idea?

Thanks in advance

Paolo Sinigaglia