try use
arc a -lc2000 -ed -ep1 -r -ma -md -mx -s; -w.\temp -mpzlib+srep+lzma:a1:mfbt4:d185m:fb273:mc10000:lc8 data.arc "game location"
and use srep 3.2 and freearc 0.67 date 15/3/2014 and in arc.ini use
[External compressor:srep64]
header = 0
packcmd = srep64 -m3f -a2 $$arcdatafile$$.tmp $$arcpackedfile$$.tmp
[External compressor
zlib]
header = 0
packcmd = pZLib e -m2 -c16m -b256k -t2 - -o - <stdin> <stdout>
and for decompress try to use cls-srep 3.3 by profargo with pzlip
and in arc.ini
[External compressor
zlib]
header = 0
unpackcmd = pzlib d -t50p - -o - <stdin> <stdout>
try to use isdone original script with inno 5.5.9...