21899 (or was it 21889?) is officially released build.No wonder its fastest
Ok,here is TUT how to make custom winmo theme:
1)copy classicblue.tsk to your PC
2)rename it to classicblue.tsk.cab
3)now its a cab file and you can use wince cab manager to replace images inside (stwater_480_800.jpg and stwater_800_480.jpg)
4)Save as "your new name".tsk.cab
5)rename to "your new name".tsk
Theme is ready to use.Best place to store them is in root of SD card (not in folders).