The I900 firmware is European and will (NOT WORK) on US providers network, if you want it just for the i900 - Manila 2D Touch FLO interface by all means use it and you will not have any phone features. Granted the touch-flo2D is awesome. Try this link copy and past
http://www.mobilematt.net/TF2D%20Skins.html . I have not tried any off these buy I am. Right now i'm using a touch-flo 2D on my omnia i910 but can't remember where I got it from. I will back track to find it. Hope this helps. Research your self : USE MOBILEMATT TF2D AT YOUR OWN RISK!!!!!!!!!