I used johnny2678's iGuidance OEM that I got from the PPCGeeks FTP site in my Helmi WM6 ROM and it works fine for me (using a Holux GPSlim 236 BT receiver). You have to put your own copy of the iGuidance exe file in the OEM folder.
If you want to give it a try on your next ROM, you can find it here
/Apache/New Core OEMs/johnny2678_OEMs
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