Like anything else you have to do it a couple of times to work out the bugs but it's worth it. John Cobb's bikesport website had some pros and cons on tubulars under their technical department here:

http://www.bicyclesports.com/...ge/index.html#111299

Here's a good article from the Vittoria site on how to glue tubulars:

http://www.bicyclesports.com/...ge/index.html#111299

I use "Vittoria Mastik 1" and pretty much do as the Vittoria method suggests. Everybody has a little different spin on the procedure. A couple of things I like to do are wear disposable latex gloves and apply the glue to the rim with my finger. Also I like to mask the braking surface of my rims with electrical tape to make cleaning any little glue blobs easier. If you do need to clean up any blobs from the rim, try 3M Adhesive remover. I checked with Hed and thet's what they suggested for the Hed3's .

I don't subscribe to the "many coats of glue method" that the TDF or USPS riders do. They don't have to try to remove a tire from the rim if they flat during a race!

Oh yeah, don't wear your favorite shirt the first time you mount your tire.