All documents which is written in Japanese are available on index-ja.html.
I think international communication is very interesting for sharing results, problems, original factors and etc. But please understand I, Japanese, cannot explain how to make original maps in clear English. If anyone criticize me for not supporting English or using unnatural English, I'll NEVER develop igun's English support. And also, if anyone translate or understand making maps, please share it for people. Thanks for using it, and good luck with making maps.
gmap.dll is an export plug-in for Platinum v1.60f. Before you use it, copy it to Platinum's plugins directory and copy igun.exe and zlib.dll to texture's directry.
And my friend write great guide of making original maps and I translated it. If you want to make advanced maps, please see coma-en.html. Translation haven't completed yet.