Hi WV Carpman,
You are right, boilies are a bit different from dough bait. I believe it is a combo of the eggs and semolina that make them hard as they are boiled.
While doughbait can be used on a hair (with a small round spring type rig available from Korda) It is very easy for nuisance fish to pick your hookbait clean in no time! This is why boilies are so effective. Other fish can beat the daylights out of them and will still remain on the hair for the carp to eat!
A good dough type bait would definitely be better as a "packbait" on a feeder lead with a boilie or corn as a hookbait.
I have been experimenting with using a 14-16 mm marine halibut pellet from
Dynamite Baits as hookbait. They are hard like a boilie, but have a great instant attraction quality such as high fish oils and amino acids. They are virtually indestuctable from other fish and are easily digetable and nutritious for carp. Making them great for baiting a spot and for hookbait as well!
Check out
www.bigcarptackle.com for a great selection of baits and supplies.