Help sniffing Metal Assault files (Metal Slug clone)

[Struggleton!]

Would anybody happen to still have these tools, or a quick explanation on how to use offzip to successfully extract it? Have had zero luck, and this game is coming back soon.

Code:

comtype zlib
idstring "SFILESYSTEM"
for FILECOUNT = 0
    get type long
    if type == 0
        getdstring DIR 264
        get FROM long
        get TO long
    elif type == 1
        getdstring NAME 256
        get ZSIZE long
        get SIZE long
        get NONE long
        get ENDOFFS long
        savepos OFFSET
        clog NAME OFFSET ZSIZE SIZE
        math OFFSET + ZSIZE
        goto OFFSET
    endif
next FILECOUNT

I don't have any samples to analyze so I had to go off of the notes posted before :/ Hope this works; use it with QuickBMS.