I have been searching for a way to use SDHC on my x51v for about two years now. Three days ago, I just happened to stumble upon an SDHC driver/.cab file a couple days ago. I could not believe my eyes when I took my 16gb SDHC out of my camera and plugged it into my x51v that has wm5 with the original OS build, and I could see the full 16gbs!!! AMAZING!!! I got in my car and bought a 32gb SDHC for $69 at Fry's and I could see all 31gb's (some space is reserved for the system). I loaded up all my encoded AVI videos and mp3s on to it and I am able to see all 31gbs of files... amazing!
Where has this file been guys....??? :)
I would go with this file, I am very picky when it comes to risking a dead brick x51v, using this .cab file is the safest way to go.
If you need a link to it here it is via the mobilitysite forum:
SDHC driver for original aku 2.3.1 ROM
Or the direct link to rapidshare:
RapidShare: 1-CLICK Web hosting - Easy Filehosting
Regards,
ztdztd