I'd go out and buy the packs. I still use the C64 computer to type essays when my printer breaks down. Sorry to disappoint you this week, but I've had a rough day and worked far into the night on this one. Money makes the world go 'round. Well, okay, so maybe that's not fair.
Sex influences things too.
Not worth it when you can simply download it from the site, and I already have Half-Life. Other than that, it's a waste of money in my opinion. Even then, platinum edition HL will take care of everything for you. Of course, if someone just sent out the mod files, that might change, but let's not encourage that. It keeps on getting rereleased, even though everyone already owns a copy, hence becoming rather humorous cash cow.