NOTE: these are not well tested by me; that's what I'm counting on you for. Please keep that in mind if you decide to use any of it :)
Download here (ITG 2 oITG-b3-DEV-2.itg, 5.2 MB)
Download Patch.rsa for OpenITG (place in /stats/ if you're not currently running oITG)
Installation instructions are here. This is all you need for the arcade build :)
Download patch data (patch.zip, 1.4 MB, required for ALL builds!)
Linux: game binary (openitg.gz, 3.2 MB)
Linux: GTK module for splash window (GtkModule.so, 0.1 MB)
Windows: zipped game binaries (regular/SSE2 + debug info, extract into Program) (4.7 MB)
Installation instructions: