Tom Installer doesn't work for me anymore.
Here's how I do it with PC98:
1. Open compmgmt.msc.
2. Go to Storage > Disc Management.
3. Click Action > Create VHD.
4. Select Dynamically Expanding. VHD or VHDx is a matter of personal preference.
5. Right click on new drive > Initialize Disk > OK.
6. Rickt click on new empty partition > New Simple Volume > Next > Assign any drive letter.
7. Name it to FF7DISC1, FF7DISC2 or FF7DISC3, depending on disc you want to play on.
8. Copy ff7.exe, ff7dll.dll and data folder from FF7INSTALL disc to the root of your newly created VHD.
9. Copy movies folder from FF7DISC1, FF7DISC2 and FF7DISC3 to the root of your VHD.
10. Create following .reg file and run it:
Windows Registry Editor Version 5.00
# Game installation
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Square Soft, Inc.\Final Fantasy VII]
"DataDrive"=".\\"
"AppPath"=".\\"
"DataPath"=".\\Data\\"
"MoviePath"=".\\Movies\\"
"DiskNo"=dword:00000000
"FullInstall"=dword:00000001
[HKEY_LOCAL_MACHINE\Software\Square Soft, Inc.\Final Fantasy VII]
"DataDrive"=".\\"
"AppPath"=".\\"
"DataPath"=".\\Data\\"
"MoviePath"=".\\Movies\\"
"DiskNo"=dword:00000000
"FullInstall"=dword:00000001
[HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Square Soft, Inc.\Final Fantasy VII]
"DataDrive"=".\\"
"AppPath"=".\\"
"DataPath"=".\\Data\\"
"MoviePath"=".\\Movies\\"
"DiskNo"=dword:00000000
"FullInstall"=dword:00000001
[HKEY_CURRENT_USER\Software\Classes\VirtualStore\MACHINE\SOFTWARE\Wow6432Node\Square Soft, Inc.\Final Fantasy VII]
"DataDrive"=".\\"
"AppPath"=".\\"
"DataPath"=".\\Data\\"
"MoviePath"=".\\Movies\\"
"DiskNo"=dword:00000000
"FullInstall"=dword:00000001
[HKEY_CLASSES_ROOT\VirtualStore\MACHINE\SOFTWARE\Wow6432Node\Square Soft, Inc.\Final Fantasy VII]
"DataDrive"=".\\"
"AppPath"=".\\"
"DataPath"=".\\Data\\"
"MoviePath"=".\\Movies\\"
"DiskNo"=dword:00000000
"FullInstall"=dword:00000001
11.
Download and copy 1.02 patch to VHD root.
12. Run config.exe, set and confirm your settings.
13. Download
Aali's ff7_opengl-0.8.1b.zip custom driver and copy zip contents to root of VHD.
14. Open included .reg file.
15. Uncomment #music_plugin = plugins/vgmstream_music.fgp from ff7_opengl.cfg.
16. Google
ff7 music_ogg and copy it to data folder of VHD. Alternatively copy from Steam Version.
If VHD gets unmounted just double click it's file.