If you install Win 98 on VirtualPC 2006 you will have no problems with hardware. Exporting/importing registry entries is not so difficult. Those Win95/98 games use registry similar way DOS games used .ini/.conf files. For finding relevant registry entries use uninstaller program - I myself use Total Uninstall, but free Revo Uninstaller would suffice. Remember to install game on Win7 in the same path as you are going to play on Win98 (so if under VirtualPC you are going to put game folder on c:\aaa - install game on c:\aaa in Win7. While exporting registry entries using regedit use Win9x/NT format.
If you require additional help – mail be at ‘my gog username’(at) poczta.onet.pl or just start separate thread on forum.

Try disabling Data Execution Prevention in Windows. That might get realMyst and Journeyman Project 2 running.

Won't that put my system at risk...?

I suppose now is the opportunity to pick up that camp classic of my teen years Phantasmagoria 2 that I passed on over halloween. I'm expecting it to be even more kitschy, low-budget, counterintuitive, and underwritten than I remember. All part of that 90s FMV charm.

Speaking of which, GOG would be well-served to get "Tender Loving Care" on this site, one of the more cerebral and better-acted of these types of games from that bygone era. You could call it a voyeuristic psychiatric drama, hosted by veteran stage/film/tv actor John Hurt, which focuses more on questionnaires and psych-profiling than traditional puzzles. Aftermath Media, the production company, even still has their ancient website still up:

http://www.aftermathmedia.com/tlc/

I don't know if they're still selling the game as the advertised rate through their "store" (or even if the company is still around aside from a letterhead), but digital distribution would suit their now-forgotten DVD interactive games.

I was looking at Caesar 3 and like ancient Roman history, but I sort of suck at city-management type games. I tried out "Stronghold" on this site and despite enjoying Castles/Castles 2 immensely as a young lad I sort of bombed getting a handle of the mechanics and economy in Stronghold (I didn't even bother with combat) and didn't find the tutorial helpful at all.

DEP was implemented by Microsoft to increase securitiy against harmful programs but it didn't exist in earlier versions of Windows. Because of this, older games can sometimes conflict with DEP and Windows will see them as a threat. I turn it off just to help increase compatibility with old software... It's your call.

DEP can be dissabled for specific programs or applications, but left enabled for everything else.