Assuming that you installed Sybase OpenClient 15.5 from the 15.5 PC Client:
Install ActiveState Perl from http://www.activestate.com (free) and install DBI if it isn’t already installed. It should be but you never know…
- Start -> ActiveState Perl -> Perl Package Manager
- install DBI
- exit
Now, the easy part. Install the DBD::Sybase 1.09.01 PPM:
- download DBD::Sybase 1.09.01 PPM
- extract zip file to temporary directory (e.g. c:\test)
- Start -> Run -> cmd.exe (as Administrator if Vista or Windows 7)
- cd \test
- ppm install DBD-Sybase.ppd
- exit
That’s it 
It should automatically install the DBD::Sybase for Perl 5.8 or 5.10 depending on which version of Active State Perl you have installed.
