actualy about all that onlyy thing i know about is the battle suit. its a variable spawn protection. set it to 0.

u should try this tool.
works not perfecly with e+ 1.03 but so u can learn a bit

http://www.adler.excessiveplus.net/stollo/editor/index.htm
and direct link
http://www.adler.excessiveplus.net/ftp/e+_server_builder_build_5_beta_9.zip

------------

1)
not possible as i know .. u can add quad, haste, invisibility, flight, regeneration, battle suit

2)
[code:1] /* Map Powerups
*
* 1 - Quad Damage
* 2 - Battle Suit
* 4 - Haste
* 8 - Invisibility
* 16 - Regeneration
* 32 - Flight
*
* Example: Flight + Quad Damge -> 32 + 1 = 33
* or as human readable 'Powerups: "32 + 1";'
**/
Powerups: 63;
[/code:1]

so change ur POWERUPS to "61"

3)
what is item_invis ?
u mean invisibitity?

[code:1]
/* Spawn Powerups (only after first connect)
*
* 1 - Quad Damage
* 2 - Battle Suit
* 4 - Haste
* 8 - Invisibility
* 16 - Regeneration
* 32 - Flight
*
* Example: Quad Damage + Haste -> 1 + 4 = 5
* or as human readable 'Start Powerups: "1 + 4";'
**/
Start Powerups: 0;
[/code:1]

set START POWERUPS for battle suit "2"
this is only for first connect...
after death i dont know. is not possible as i know.

4)
[code:1]
// Topic 'Railgun' is required
Railgun {
Ammo: 100;
Cycle: 100;
Damage: 40;
Splash Damage: 0;
Regen: 400;
Radius: 0;
Knockback: 0;
Bounce: 0;
Sky: 0;
Weight: 1.0;
Self Damage: 0.5;
Switch Time: 0;
}
[/code:1]

set SELF DAMAGE higher
u can add a self damage when u shot the rail .... for the hook its not possible!!

also u must set DM FLAGS "0"

[code:1]
/* DM Flags
*
* 1 - No Self-Damage
* 2 - No Falling-Damage
* 4 - Infinite Health
* 8 - Infinite Armor
* 16 - Infinite Ammo
* 32 - Drop Weapons on Death
* 64 - Don't allow \drop
*
* Example: No Self-Damage + Infinite Ammo -> 1 + 16 = 17
* or as human readable 'DM Flags: "1 + 16";'
**/
DM Flags: 1;
[/code:1]

5)
u cant block only damage for lava ... only total self damage (see dm flags) or maybe infinite health

6)
not possible!!!