Hey there.
I'm also a big S.S.H. fan too.
I have a bunch of the MIDIs he uploaded back in 2001 and 2002 I got using Archive.org a few years ago.
https://dl.dropboxusercontent.com/u/...6-tdb2_ssh.rar
I'm not a guitar player,so I can't know for sure,but the guitar parts seem a bit strange as they are programmed for Yamaha MU2000 synth,but I think it might be useful for you.
By the way,I think he's part of Hellion Sounds (compare the guitar synth sound in some tracks,for example compare Battle 1 from FF Mystic Quest arrange from the first Hellion Sounds CD to some 2004 S.S.H. music,and also the Etrian Odyssey arrangement from the latest Hellion Sounds to Forgotten Ruins,which were released in the same year).
I also think that he went by Ges.M in some Woodsoft albums (the Afterburner arrange in AGES sounds like it uses the same sound setup as Atelier Iris Deceitful Wings to me),although,I have don't have definitive evidence of this.