In respect of the above.
Downloaded the first of the 2 ammended files suggested by l3th4l and tried the first option.
Replaced the fire_add file in the tnormal/tex folder with the new .dds fil and renamed that to "firee_add2 from "newfire_add". Did nothing with the TGA file as this was not referred to in the instructions.
This was down whilst in mission, but as it is a grahic file I assume it would make no difference?:hmm:
Unfortunately still have the block effect in respect of fire.
Will try second suggestion. From the way the instructions are worded I am assuming this can be done via JSGME; could someone please confirm?
Hope this feedback is of some constructive use to others; if not I will stop clogging up the post.
Cheers.