After RA1 open source code was released to the public, guess what, finally someone had done it, and no, it's not Hyper.
Updated Jan 24, 2012:
Some other user named Vistha managed to tweak the RA1 hi-res and added in the boxes to the sidebar for the 1024x768 resolution making it seen compared to the C&C1 hi-res version that Nyerguds did. As of now, that user who modified it needs some testers to try it out.
Thread and download: http://forums.cncnz.com/topic/16477-...esters-needed/
(Note you need RA1 patch 3.03 to be installed in order to run that hi-res. It's still in the experimental stages.)
Months ago, a modder named Hifi had done it all firstly with all the good experimentation for the RA1 hi-res and he even released some media to prove it all. Old file download and media are all available in: http://hifi.iki.fi/ra95-hires/
Edit: The RA1 game engine as OpenRA (which is in http://openra.res0l.net) was thought to be the source code and as "Hifi" mentioned in his website, there's no source code for this hi-res option.