This is another reason it'd be nice to have an official GOG torrent server

A GOG torrent server would draw too many connotations of illegality even if you did pay legal money for it. In most people's minds torrent = pirated software. The last thing we want is the last bastion of good old games being embroiled in the drama surrounding torrents and the like.

yeah thats a point, there'd also be a matter of securing the access to the torrents themselves so they're not just posted all over

In what sense?
The downloader already pauses and resumes, but when, while wating for the new session ID from the server, it doesn't get it, it just deletes the download and i have to start it all over.

well, it sounds like you're using the GOG downloader, correct? I believe it does have a pause/resume feature. If you attempt to pause it prior to the session becoming corrupted, then it might be able to continue where it left off.

I see. Well i'd have to do that for hours, every minute, until the 2 gigs download is completed.

well some solution is better than no solution. I'm sorry to hear your ISP does not provide satisfactory speeds.

I suggest you try the browser download method using a third-party download manager. I use , but it's not free; [url=http://www.flashget.com/en/download.htm]FlashGet is a good free one. Download managers allow you to resume broken downloads, and won't lose any progress even if the download source stops working (giving a 403 error or whatever). If that happens you can choose not to delete the unfinished file (if you are asked to do so) and simply feed in a new source URL from the browser download method; the download will then pick up where it left off.