The D&D Adventure game is a **safe** bet. The rules are simplified, pregenerated characters are provided, etc.. The adventures themselves are ho-hum by **our** standards, but new players will have enough on their hands. You definitely should add some roleplaying to the adventures.
**SPOILER**
For example, the first adventure (more like an encounter) has the players rescuing a unicorn from some goblins. Read: Fighting goblins. All four of them. Zzz. However, modify the adventure suchthat the PCs first encounter a young unicorn whose mother was captured by goblins, and attempts to seek help from the PCs, but is on the shy side.
The Dungeon has shorter adventures, with lots of color. I'd also look there for ideas.
Or are the players used to long games? Are they already committed to multiple playing sesssions?
Cedric.
aka. Washu! ^O^