create a MMORPG game

That depends on what kind of coding you know, if you php you could do something like earth2025 or kings of chaos.

Or if you know C++, Visual Basic you could do something like WOW or NWN.

Best place to start are game tutorial sites or purchasing books for game development. I believe the For Dummies series has a book on that.

So here are a few sites on what to do and what you need.

http://www.devmaster.net/articles/building-mmorpg/
http://www.splamm.com/elysium/
http://www.onrpg.com/gate.html?name=Conten...ories&cid=2

I also recommend getting rpgmaker and also NeverWinter Nights 1 or 2 to help pick up how it is done

create a MMORPG game

How do I make an MMORPG bot

You need to know a lot to do that... first of all most MMORPG's have some way of blocking third party programs. So your problem here is not to write the bot (that is the easy part) but your problem is to bypass the so called 'wall' against bot programs.
I have never heard of Autolt... but then again I don't know that much about computers, just some basics.
I would recommend writing your bot in C++ it is easier to work with memory locations, and I think you also have to know Windows API so that you can figure out how to send commands like 'walk' 'loot' 'kill/hit' or whatever you have in runescape.
You'd have to find some way to hook your program into runescape...
And as for packets, you'd need to read them so that your bot would know how to orient itself and would be able to 'see' what its doing.
I don't think you need to modify any packets though... that would be a diff type of hack....
But then again I'm a noob when it comes to this. I could never write the actual bot, dunno how to bypass! Good luck though. It will take you a while...

make a mmorpg in flash

There will be a quite high level of expenses for you to create an MMORPG game. First, you need servers, probably an Intel® XEON™ Processor, 2.20 GHz, 2 GB RAM, 10 TB HDD, would cost you around 2299 $. My dad says that would be enough to accomodate up to 800 players, depending on what type of game are you creating, if you are making a game with the quality of RuneScape, that could accomodate upto 950 Players, if you are creating a game with the quality of Cabal Online or WOW. Maybe, 400-475 Players.

You will need help from computer programmers. You will need an AI Programmer - for NPC or enemies in the game (how they move, attack or act). A graphics designer - for the terrain, character, items, environmental design. A Visual Effects Expert - a person who could add cool visual effects on the game like lighting, sound, water waves, fire, etc. A Director - a person who organizes the game according to the story or plot of the game. SQL Expert - someone who can program your servers and automatically store subscriptions, registrations, player accounts and databases. A Core Network Engineer - for creating an online network for players can talk, interact, play together. A Gaming Security Programmer - a programmer who programs the security suite. Keeps players playing by the rules.

It's up to you what type of programming software you would want to use. Java or Visual Basic 2008. But I don't know about Flash, my dad says that creating a 3D flash can be too costly and time-consuming. In visual basic, take advantages of visual C++, visual C#, etc. programming. I know it's hard but it's worth it.

TIPS:
- Decide if you want a web-based or "installed" MMORPG.
- Keep the graphics detail at a medium level if you want a web-based MMORPG. So players will be able to play it smoothly with their standard configuration.
- Visual C++, visual C# programming can be costly.
- JavaScript programming is easy, but not when programming in 3D.