Like ikegami said, you probably just want to use DBI.

If you needed to write an object-oriented module, I'd recommend Moose, but it doesn't sound like you need to.

To get started (if you actually don't need an OO module), just create yourself a SybaseManip.pm file, put package SybaseManip; at the top of it, and start writing some subs to do your bidding. To use your code from a test script, just put this at the top of said script:

use lib 'path/to/where/SybaseManip.pm/lives';
use SybaseManip;
[download]

and start calling your functions.