Topical Use of Opioids

Someone recently posted a link to Pain-topics.org and I was reading the information related to the topical use of opioids (http://updates.pain-topics.org/2011/01/is-there-role-for-topical-opioids-in.html)

My most serious problem with opioid use is that I cannot take any past 5pm without it compromising my sleep that night. I am part of the 10% or so who don't get groggy and even 6 hours after taking 10mg of hydrocodone, 5mg of oxycodone, etc. won't be able to sleep.

So, I'm now curious about topical use and thought I would give it a try. I'll discuss it with my PM, but wonder if anyone here has had any success?

If so, for what conditions, what opioid, and how was it prepared for topical use?
I have scoliosis, extra oxymorphone and a jar of DMSO. My thought was to follow the research data related to preparation and apply it to the skin from my spine out to the various muscles that get into spasm due to nerve root impingement. So, about an 8inch by 10inch area. Probably will start with a smaller quantity to test for skin reaction first.

Definitely talk to your doctor about it first.