If they are already in x format m8 you dont need to convert them all you need is a fpe file
;header
desc = test
;visualinfo
textured = 1
effect = effectbank\reloaded\entity_basic.fx
castshadow = 0
;orientation
model = test.X
offx = 0
offy = 0
offz = 0
rotx = 0
roty = 0
rotz = 0
defaultstatic = 1
materialindex = 1
collisionmode = 1
;statistics
strength = 25
explodable = 0
debrisshape = 1
;ai
aiinit = appear.lua
aimain = default.lua
aidestroy = disappear.lua
;spawn
spawnmax = 0
spawndelay = 0
spawnqty = 0
PC SPECS: Windows 8 Pro 64-bit, Intel I7 (PASSMARK 9529) 4GHz CPU, Asus R9 3GB GPU (PASSMARK 6858) 32GB DDR3 MEM (PASSMARK 2842)