Okay, so I added a new section to the menu, SC_SPECIALII, added two elements to it, called ACCE and STNH, code for which is here:

{"STNH", PIXPACK(0xEF07F7), 0.0f, 0.00f * CFDS, 0.90f, 0.00f, 0.0f, 0.0f, 0.00f, 0.000f * CFDS, 0, 0, 0, 0, 0, 1, SC_SPECIALII, R_TEMP+0.0f +273.15f, 88, "Only lets STNE through. Use with PROA to make a stone generator."},

{"ACCE", PIXPACK(0xB2F986), 0.0f, 0.00f * CFDS, 0.90f, 0.00f, 0.0f, 0.0f, 0.00f, 0.000f * CFDS, 0, 0, 0, 0, 0, 1, SC_SPECIALII, R_TEMP+0.0f +273.15f, 88, "Accelerates LASR, PHOT and NEUT."},

code for SPECIALII menu is

{"\xCC", "Specials II", 0}

and it shows STNH as the conductive indestructible solid wall, and both elements have no name over their icon on the menu. Help!

#define SC_SPECIALII 13

I think so.

I tried changing the name of the elements, their menu position, everything, but it still wouldn't work...

It is the fifth one I am adding, the numbers are right.

The list is

#define SC_WALL 0
#define SC_ELEC 1
#define SC_EXPLOSIVE 2
#define SC_FIRES 3
#define SC_GAS 4
#define SC_LIQUID 5
#define SC_LIQUIDII 6
#define SC_POWDERS 7
#define SC_SOLIDS 8
#define SC_NUCLEAR 9
#define SC_PARTICLE 10
#define SC_LIVING 11
#define SC_SPECIAL 12
#define SC_SPECIALII 13
#define SC_TOTAL 14

@Pilojo

What is the limit

@Cracker64

Yep, have all of them.