Hum, it's not mentioned on the OP that the files are password protected for that game at least.
Everything's universally passworded.
Everything uploaded as 7zip volumes, slightly compressed, average volume size being 150MB.
Password protection: nacholicious
No idea about Win7, no they're not visual novels, yes they're repetitive (They're vertical shoot em ups, all about pattern memorization.), no you don't have to play them chronologically. Generelly the newer games become gradually less interesting so I'd start with 6 anyway.