It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

×
The high-res mod is mentioned in the thread "Recommended MOD's and Patches for Fallout 1 & 2" in GOG's Fallout forum, too.
They indeed should mentioned it with full explanation in email. And make some forums threads too - here or in gemeral. And pin them.

As for removing - this time it is normal. Unbundled and re-released separately now for absolutely free.
I still have them, I got them free when i bought Oblivion.