In DVD Catalyst, select Apple > iPod Classic (Fast)
This produces video files that will play properly on the Impact.
Unfortunately when a higher screensize is selected, the files will not play, however, the 320×240 resolution of the iPod CLassic profile produces great quality.

As of DVD Catalyst 3.84.5, DVD Catalyst includes profiles for the new Google Phone, the Nexus One.

The current version (DVD Catalyst 3.84) does not include a profile for the Nokia N86 yet, however, it can convert video and DVDs to great looking video files that will play nicely on the N86.
The next DVD Catalyst release will include a profile for this device, however, for now, just select Apple > iPod Classic [...]

The current version (DVD Catalyst 3.84) does not include a profile for the Nikia N97 yet, however, it can convert video and DVDs to great looking video files that will play nicely on the N97.
The next DVD Catalyst release will include a profile for this device, however, for now, please use the following settings:
Select Apple [...]

As of 3.83.5, DVD Catalyst has a preset setting for the Droid. Just select Verizon > Droid from the dropdowns, and all the settings will be set properly for your device.
While the Droid supports quite a few different video formats, the settings in DVD Catalyst make use of the H264 video format, which provides the [...]

To convert DVD to your Samsung s8000 Smartphone, select the Apple > iPhone profile in DVD Catalyst. The created files will play just fine, however, to get the best possible quality, click on “Modify”, and change the screen size to 720×480, and increase the video quality to at least 700kbps (1000 recommended)
Based on specs found [...]

While not officially released, based on the hardware, previews and rumours, it’s safe to say that the device will work nicely with video encoded using the HTC Touch Pro2 profile in DVD Catalyst.
Screensize as well as supported video formats are identical.

Based on specs found here
http://www.gsmarena.com/sony_ericsson_xperia_x2-2926.php
I would suggest to use the Sony Ericsson > SE Xperia X1a setting. These settings match the video specifications for the Xperia X2.

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