So I have had the HTC Touch Diamond for around 1½ days now, and I have already voided the warranty.
The thing is when running a Windows operating system; you can’t just change the language. So I needed to hack it a bit, while searching around the web I found a brilliant forum for these kinds of hacks. I will post them a bit further down.
Thinks that have been improved and added:
Microsoft .NET Compact Framework 3.5
Custom Tweaks for Performance
Enabled HSUPA
Security Enabled

Removed some “Exclusive” applications from the Task Manager’s registry so that they will now appear to be closed when opened. (no harm to the system)

Old IRDA Crap (no longer required)
Welcome Center
Alarms (were taking up 5MB)
Windows Update (does not work)
Sample Music (just crap)
Other redundant files

I will continue posting as soon as I experience some good or bad things about the phone, but for now – After being able to install a English version instead of the Swedish version everything seems perfect.

Hard-SPL: http://forum.xda-developers.com/showthread.php?t=400402
ROM’s: http://forum.xda-developers.com/showthread.php?t=399680