Hi Kevin,
If you are wanting more functionality with Vac/Sick time I would recommend using either PTO Manager or HR (Both modules are included with GP2013). While HR is more robust and has more options, it sounds like PTO Manager may be just right for your situation. You can limit the amount of Vac/Sick accrued and it will stop at 80 hours per year or to whatever amount you set up.
Hope this helps,
Jeff
