I went ahead and updated to this ROM, and it installs fine on my u8800-51. But, there are a few issues. First is that I cannot download or update any apps in the Google Play store, I get an error. Second is that overclocking is no longer available. The previous ROM let me boost the CPU to 1400 or so. Now I am stuck at the stock 800.
I love the theme of this ROM a lot, I just wish those 2 issues didn't exist.
(Also, still no 4g/3g... no clue why)
EDIT: I was able to get 4G working on HORSE V1 (I downgraded because I couldn't overclock on the new ROM).
Here is how I did it:
I downloaded a backup image of the stock 2.2 ROM, which was provided by savagehq, and linked in one of the topics skipped made.
I set the phone into pink screen mode and plugged it into my PC
I installed and opened Roadkil's Disk Image, I then burned the ROM image I downloaded to the phone (the physical disk that was around 3.6 GB)
After the burning/installation was finished I performed a factory reset using CWM.
I then reset the phone, and there I was back at stock 2.2 with working 4G.
I then rooted the phone and installed 5iromtoolbox.
I backed up the IMEI.
I then went back into CWM and installed HORSEV1, without doing any wipes.
I now have a working HORSEV1 ROM and working 4G.
Hopefully overclocking can be fixed on Power Black HORSE, then I will upgrade. =D