On Linux (AVlinux or any linux with Wine, which is required not for the OsTIrus emulator (which comes as a linux VST3 as well as a Windows one (but I couldn't get the WIndows VST3 nor VST2 to work on Windows7, despite serious effort and GPT style trying), but for the virus.info software, which carries all the TI sounds.

1. Download the Windows 64 bit software from https://www.virus.info/downloads
2. Download the linux VST3 from https://dsp56300.wordpress.com/ostirus-downloads/
3. Open Terminal in AVlinux and type wine uninstaller
4. When the Wine installer/uninstaller opens, add something, and find your .msi file from virus.info and install it (it will open the Virus installer and you go through the steps, where you can deselect the 32bit version from the install list, and also you can just click OK when it tries to search for a hardware AV (not sure if it just connects automatically or you need to reinstall if/when you connect the hardware AV).
5. Install your .deb file from dsp... (However, I'm not sure if you need to do this. I did it this time, but I already had the vst in my VSTs for Bitwig folder, and it already opened fine (just didn't have any sounds). ... Anyway, you get to the point where the OsTIrus vst will open in Bitwig.
6. Go into user/.wine/driveC/program Files/Access Music/Virus TI/Common and copy the firmware.bin file and paste that into the VSTs for Bitwig folder (it has to be beside the OsTIrus vst (I actually don't know which particular file this is but in Bitwig it appears in the VSTs for Bitwig main folder so I pasted it there and it worked).
7. Reload OsTIrus in Bitwig and it should have all the sounds now.