did you read how to set this up????
look in amxconst.inc (addons\amxx\scripting\include)
and you will see this
Code:
/* Id of weapons in CS */
#define CSW_P228 1
#define CSW_SCOUT 3
#define CSW_HEGRENADE 4
#define CSW_XM1014 5
#define CSW_C4 6
#define CSW_MAC10 7
#define CSW_AUG 8
#define CSW_SMOKEGRENADE 9
#define CSW_ELITE 10
#define CSW_FIVESEVEN 11
#define CSW_UMP45 12
#define CSW_SG550 13
#define CSW_GALI 14
#define CSW_GALIL 14
#define CSW_FAMAS 15
#define CSW_USP 16
#define CSW_GLOCK18 17
#define CSW_AWP 18
#define CSW_MP5NAVY 19
#define CSW_M249 20
#define CSW_M3 21
#define CSW_M4A1 22
#define CSW_TMP 23
#define CSW_G3SG1 24
#define CSW_FLASHBANG 25
#define CSW_DEAGLE 26
#define CSW_SG552 27
#define CSW_AK47 28
#define CSW_KNIFE 29
#define CSW_P90 30
so hegrenades are number 4.
so your ammo.ini would have this line
where x is the number of hegrenades you want to start with.