While alcohol can help deal with withdrawals, due to its duration, unspecific effects, and dosage, it'll usually just make your WDs last longer without actually helping you get off the drugs.
If you're WDing off benzos, the best thing you can do is taper using benzos, particularly long acting ones such as valium. If they're serious and you have trouble getting hold of them, the best thing I can recommend is talking to your doctor.
Could you give some more information about your benzo use though - what benzo, what dosage, how long have you been using, etc.?