Q's

[Doctor Cool]

How do you add the script for a battle system effectively? (Where do you put the battle system when you boot up the game.)
I guess how do you add scripts in general? (I know where they are but there's a boatload of information to them)
I keep on running into invisible walls. What's going on?
How do you add more than one monster group in random encounters?
Where's the script for someone to always follow you in every map?
Is there an easier way for people to dissapear besides making a new map?
(I use RPG maker xp)

 

[regi]

To add scripts, usually you go to "Script Editor" and right-click Main and press "Insert." Paste the code in the new section. Most scripts go above "Main" and below "Scene_Debug."

With invisible walls, it seems like you've been erasing with the wrong tiles. Check the 2nd and 3rd layers, make sure to go over every blank tile with the UPPER LEFT TILE. Remember to always use this tile for erasing.

To add more than one monster group in Random Encounters, just double-click the space below the first monster.

For following characters, you want the "Caterpillar Script." Try this.

And finally, to make NPC's disappear, you just need some basic switches.
Click "New Event Page" near the top of the event to open a new tab in the event. Now check the Conditions box "Switch --- is ON." Specify a switch, and then go back to the first page. Wherever you want the NPC to disappear, just turn the switch you previously used on.

Good luck with it!

EDIT- @Despain:

 

[Despain]

How do you add the script for a battle system effectively? (Where do you put the battle system when you boot up the game.)

Usually you paste it in a new script above main (I don't know what you mean by "when you boot up the game", you install the scripts in the rpg maker program before you play the game at all).

I guess how do you add scripts in general? (I know where they are but there's a boatload of information to them)

Same as above. You usually paste them into a new script above main.

I keep on running into invisible walls. What's going on?

You're erasing with the wrong blank tile. Make sure to erase with the blank tile in the upper-left corner of the tileset thing, not any random blank tile you choose.

How do you add more than one monster group in random encounters?

You can't fight more than one monster group in a battle... I don't really get what you're asking here.

Where's the script for someone to always follow you in every map?

Search "caterpillar".

Is there an easier way for people to dissapear besides making a new map?

Learn switches and variables. They're absolutely vital if you want to do anything with RPG Maker. Try a forum search or (I'd actually suggest this one) experiment with them on your own until you understand them.

Edit: DAMMIT YOU ARE NOT ALLOWED TO POST AT THE SAME TIME AS ME I AM BANNING YOU

 

[Doctor Cool]

OK thanks for answering, but the only problem left is that my guy won't move at all in my cutscenes. Or he'll go in a transport door and get stuck.

 

[regi]

You need to make sure to have "Erase Event" or turn on a self-switch at the end of every Autorun event.

 

[Doctor Cool]

Even when there's no event going on, my guy is stuck in one place. erase event, switches don't work. and erasing on the 2nd/3rd map was already done.

 

[regi]

Are you sure that tile is passable?

 

[Doctor Cool]

yup, same problem.

EDIT: I'll just copy all the maps on a new game. That seems to be the only solution.

 

[Despain]

You probably have a move route command somewhere with "repeat" checked or maybe an extra "move left" or whatever, and the sprite tries to walk over an impassable tile, and the game freezes up.