Nepal

I’m an Indian citizen with a valid acomplia original Indian Passport planning a trip to Kathmandu…I wish to travel in my own vehicle…Can I travel to Nepal in my personal vehicle? It has Delhi registration…If so, do I require a permit for that? Plz give details…

I’ll be in northern Bangladesh (Rangpur) in September acomplia sales 2009 for a research and after that I want to go to Nepal (through Darjeeling) by road. Is it possible to get busses from Rangpur to Darjeeling? Are they safe?
By the way, I have sorted out all visa things, what I need to know is the availability and safety of road journey there.