Gehn under Linux

Can anyone help me here? I use Fedora 17 with Wine 1.5 and am not having very much luck with Myst under Linux. When I installed MOUL, it installed cleanly, did the huge update OK, but gave me one of those awful stack dumps just after I logged in. Gehn installed and updated clean as well, but I got a very generic error message after logging in (I hate generic error messages...
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Anyway, I'm wondering if anyone has had any more success than I had with Uru under Linux, and if so can they help me? Here's a few more specifications if it helps...
Can anyone help me?

Anyway, I'm wondering if anyone has had any more success than I had with Uru under Linux, and if so can they help me? Here's a few more specifications if it helps...
- I'm dual-booting with Windows XP. I have more success with Gehn there, but it's a bit iffy. Sometimes it gives me an error whilst loading saying that it couldn't find a file, and sometimes it links me to my Relto OK but gives the error when I try to link to a particular place (I had this trouble linking to Kirel, Ae'gura and Gahreesen in one night before I gave up). MOUL works OK under XP.
- I'm installing MOUL and Gehn to an external 1.5TB USB hard drive partitioned into an 850GB NTFS partition for XP and a 650GB EXT4 partition for Fedora.
- Despite the fact that I just bought a new graphics card, GNOME runs in fallback mode because of the drivers (presumably).
- On a separate machine, I have Windows 7 installed, and I have absolutely no problems running MOUL, Gehn or indeed anything with that.
Can anyone help me?