found this post on a newsgroup about converting .gi files to .iso files. credits to someone who ever he is.
Here is a .bat file to convert .gi to iso.
Place the two large .gi files in a folder (ignore the small one , it,s only a cue file).
Copy and paste the following text into notepad and save as gi2iso.bat in the same folder as your 2 .gi files. From a command prompt type "gi2iso 2"-
--copy below here------
@echo off
echo ===========================================
echo gi2iso.bat
echo global image to iso conversion tool
echo by someone
echo ===========================================
if "%1"=="" goto usage
if "%1"=="2" goto 2
if "%1"=="3" goto 3
:2
ren *(11).gi 1.gi
ren *(12).gi 2.gi
copy /b 1.gi+2.gi game.iso
goto end
:3
ren *(11).gi 1.gi
ren *(12).gi 2.gi
ren *(13).gi 3.gi
copy /b 1.gi+2.gi+3.gi game.iso
goto end
:usage
echo ===========================================
echo USAGE
echo ===========================================
echo:
echo gi2iso [2 -3]
echo:
echo 2 = join 2 gi files to 1 iso
echo 3 = join 3 gi files to 1 iso
:end
-----cut here----
