I believe the only way to sync photos to your computer from your Trophy is to use Zune on your desktop. Once you do that, you can use iTunes to sync the photos to your iPhone.
There are a couple ways to transfer photos from an Alias 2 to an iPhone. If your photos are saved to the phone's SD card, you can use an adapter to put the media card in your computer port and transfer the photos to your computer. Or you can connect the Alias to your computer via cable; however, the Alias uses a proprietary port, so you have to have a cable made for the phone.
Once the photos are saved on your computer, open iTunes, connect the iPhone and sync the photos you want. If you go to Help in iTunes, there's a tutorial on moving photos to the iPhone.
If you want to transfer photos from a computer to an Alias, you can do it using one of the two methods in the first paragraph -- either via SD card or Samsung cable.