might be worth mentioning for the people that dont run a english winmo
There is a file called
FMRadio.exe.0409.mui after the installation (its in your windows directory and its hidden from the normal view so you need to activate show all in your file explorer. + not sure if its visible under the normal file explorer if its not there after installing the FMRadio.cab dl your fav file explorer and hope that its better)
this file has to be renamed to FMRadio.exe.XXXX.mui depending on the language in your winmo, I found my language id here
http://msdn.microsoft.com/en-us/goglobal/cc563921.aspx (the characters you are searching for is under LCID: hex.
for example
0x0409 is for the english language
0x0C0A spanish
0x041D swedish etc etc
propably self explaining but remove the 0x and you have the characters to type in the XXXX field where there is 0409

so if your language in your mobile is spanish then rename the file to FMRadio.exe.0C0A.mui
this had me pussled for a wee bit of time