1.) Is there any other way to edit GRPs without opening frame-by-frame? The Terran Marine has around 200 frames.
2.) Is it possible to change the main menu and the beginning screen?
3.) How do I add a grenade spell to the Marine?
4.) Does anyone have Halo-themes GRPs?

Thanks for reading!

Anyone?

2) Look in Stardat.mpq (I think) for backgnd.pcx and title.pcx. Take whichever picture you want to implement and add SC's color palette to it. If you do that correctly, just name them whatever the name of the file you're replacing in, and just add it under the correct path.

2) Make sure they have the correct sizes.

1) SF's GRP Converter and PyGRP of PyMS can both export to single BMP sprite sheets. You can do recolours much faster by editing the sprite sheet. However, if you're trying to do something requiring a bit more finesse, you're still going to end up having to modify each frame 1 by 1.

Organics would most easily be done by modelling, animating, and rendering. To do a whole custom organic unit, 200 frames... Well, I hope you are either Asian or in love with drawing.

3) If you're just trying to shoot a plain old grenade, you can use a normal unit-only spell like Parasite, give it a button and other FireGraft edits, check which iscript header Parasite calls, and write that code block out while either using a useweapon opcode or an "attackwith 2" opcode... but with the latter, you would need to change Marine's air weapon to the grenade weapon, and make sure that the Marine uses his GndAtk animation against air units.

4) No, and don't expect anyone to.

I am Asian
Okay I'll attempt to make it myself.

More questions...
1.) Is it possible to decrease the range of spells?
2.) Is it possible to kill a mind-controller when it mind controls, such that it looks as if the mind controller is controlling the victim's body?

Spells - weapons.dat
MC suicide - try iscript for the cast animation.