I was running Windows Mobile 6.1 and installed the TouchFLO 3D customisation pack and installed that, 45mb took 1 full hr to install but it was the best thing ever on my Xperia X1. you should install it, It's a matter of downloading it, copying it to your MicroSD Card on the phone and installing the .cab and thats it ! you got TouchFLO 3D working at its best !
I installed Windows 6.5 With TouchFLO 3D intergrated and the music player on TouchFLO 3D does not work ! so I don't know why but the .cab for Windows Mobile 6.1 was working much better.