for b2pi only

Hi, I have some problem to ask,
In the previous question "How to connect Sybase with perl"

You type in
1)unpack the distribution someplace reasonable.

I unpack it under cgi-bin/
then a directory "sybperl-2.10" is created.

2) Determine where you want to go (say ~/sybperl)
I don't know what this mean if I want to use it in
the cgi-bin, how can i do it?

3) from the unpacked directory, give the command
that is in sybperl-2.10 type
perl -Makefile.PL LIB=~/sybperl

The server cannot execute it and reply
"Can't open perl script "LIB=~/sybperl": No such file or directory"

If i just type perl Makefile.PL
It's ok.
Later when give the command

make install

The server said there is no permission to mkdir in the local /...
So that command is failed.

How can i do it?

Besides, you provide me a program and I want to know what is the variable $db
use at
my($db)='database';
Is it the name of schema?
Thank you very much!