I've heard great things about the Clement PDX clincher as a great all-rounder - I can only presume that the tubular version is just as good.
Another one is the Challenge Limus. I have a few friends who rave about this tire and use it all season for all kinds of conditions.
As far as how-to, there's a pretty good video at Cyclocrossworld with Stu Thorne using the belgian tape method. He seems to do the whole job in one session, whereas most articles I've read have a 24hr curing period between each layer application, except the 3rd where the tire is put on while the glue is still tacky.
My Favs for general conditions is Dugast typhoons & Challenge Grifos. Rhinos and Ralphs are for mud. have not ridden the PDX's
The Grifo XS are nice file threads and work well in dry conditions but suck in wet, loose grass and mud conditions. I don't ride highend Tubies to train, you will wear them out in a half a season. If that is your intention look at Tufo's they are far more durable. If you are not racing UCI races go with the 34s you will be so much more faster than the 32s. I race all season in 34's and only ride 32s at Nats and Worlds.
Continental has a great video that shows the multi-step installation process (for a road tire, but still relevant).
Yes, you have to aqua seal dugast tires, not sure about challenge - and yes, its the same stuff as the wetsuit repair.
You can get it at cyclocrossworld.com for 7 bucks a tube.
Skip the the aqua seal, tent seal is better. Its urethane, much thinner and takes several coats.
The old saying goes, don't race it, if you can't replace it. I race on carbon wheels and I break carbon wheels. If I had some wheels that were near and dear to me, I would not race them. Everything I race on, I expect to break. No cabon seatpost or handle bar, they break to often.