Is using INJECT & UNPACK necessary??

[MajinPenis]

A weird "follow-up" echelon release of Fire Pro D tells me that I need to INJECT & UNPACK before burning. I was wondering if doing that was really necessary. I checked the file with winrar and it turns out to be 722mb uncompressed. Judging by the file size, the file is very tightly dummied and there doesnt appear to be the need to do anything else.

I never used either inject.exe or unpack.exe before and just because I dont want to waste any cdr's I wanted to ask someone who actually knows something about this if using those two files is optional?