1. A Patrick Lassan book is not in my plans.
2. Not at the moment - I'm usually much happier when Sharpe is doing the Lord's work, i.e. fighting the French, and I think, for my peace of mind, if not his, I'll keep him at that for a bit.
3.I dunno! Honest. I suppose you start by making certain that the reader has the context well set in their mind, and then you zoom in like crazy. After that it's a question of working out what the protagonist sees, smells, hears and feels. I have to confess that I find them the easiest scenes to write - just finished one - and I don't really think too much about how to do it. I have a suspicion I'm not being very helpful, but this is probably the best I can do. Sorry!
4. Keep it moving! Again this is a difficult one to answer, because scenes differ so much, but essentially I think you have to let the reader do some of the work - in other words you don't describe everything, but put in the outline and let the reader's imagination fill in some details. Details set the scene (and convince the reader, you hope, that the fiction is 'real'), but after that they're only useful as delaying tactics - to increase suspense. But really - just keep it moving!