Basically there's two ways to go: Using FreeTDS, or using the Sybase libs that ship w/ OMNIbus and the Sybase headers from the MM page.  The way it works is:

FreeTDS	Sybase Libs	Latest Attached Files	Notes
Needed	N/A	ftds-nco-0.63.patch	This is a patch for FreeTDS, it should apply cleanly to v0.63.
Needed	Needed	dbd_syb-nco_syb-107.patch	This is a patch for DBD::Sybase. Differences between Micromuse patch and this one - Micromuse patch does not fix the 'ping' method of DBD::Sybase which lets to test to make sure that the connection is still up.  Very useful. - Micromuse patch does not fix the Netcool NULL padding issue. Instead they force you to fix this in your scripts.
Not Needed	Needed	php-nco-syb-107.patch	This is a patch for PHP, tested with version 4.4.1. Differences between FreeTDS patch and this one - This patch will only work with Netcool.  It *WILL* break your ability to use the same copy of DBD-Sybase and/or PHP to connect to a "real" Sybase or MS SQL server. - This patch supports the use of "virtual" servers in omni.dat (eg, the Backup: lines). FreeTDS does not currently support backup servers. - This patch works with the native Netcool libraries, so you don't need to install FreeTDS.  One less thing to compile!

NOTE: These attachments require using the GNU patch utility
NOTE: You will need the Sybase library headers to compile DBD::Sybase and/or PHP against the native Netcool libraries.  If you don't have these, you can grab a copy of them from the Micromuse package.
NOTE: Do not apply both the PHP patch and the FreeTDS patch to the same system. If you patch FreeTDS and link PHP to that FreeTDS, you're done.