The new version of the tools named "Super Half-Life Tools 3.5" have been released, these should be more friendly with sc since they have higher limits on things.

To see the thread and get the tools go here. http://www.svencoop.com/forums/showthread.php?t=36733

Note: these tools are considered beta and may not work correctly for you, it's more likely you'll encounter bugs if you are using 32bit windows then 64 bit windows since these ones were modified from the 64bit optimized ZHLT source code. If you have problems with them, like they crash, post it at the link above.