You should be able to patch the tire with a **tire boot**, which you should be able to pick up at your LBS. It's basically a rubber patch that you apply to the inside of the tire, where a gash is. Similar to a tube patch, but thicker. There's all sorts of things that people use for makeshift boots, too, such as a $1 bill. The important thing with a boot is that it prevents the tube from herniating through the gash.

[Park Tools Emergency Tire Boot](http://www.parktool.com/product/emergency-tire-boot-tb-2)