Ripping the dvds is a good first step. This gets rid of the encryption found on commercial dvds.
After that, it depends on what you want as output.
I have no idea if this player will play dvd-video from a usb stick. Most cannot. But you could try simply copying the folder which contains the Audio_TS and Video_TS folders and put that on the usb drive. Probably won't work.
Next thing to try is also simple. You can use Vob2Mpg to take the video/audio out of the folders and put it into one file. This will be an mpeg2 file. Many players cannot recognize this either when used from a usb stick, but it is a very simple process to try. Vob2Mpg is free to download and use. http://www.videohelp.com/tools/VOB2MPG
Vob2Mpg will start up in IFO mode, look at the line that says Please select your dvd source and look inside the Video_TS folder and find the necessary IFO file. Vob2Mpg will select it for you once you show the program where the Video_TS folder is. Once the video is processed, you'll have the main movie contained in the one mpeg2 file. This process will be comparatively fast versus the next attempt.
Ok, lets assume the player didn't like either of those options. Now we move on to conversion of dvd-video to avi. Download and install AutoGK: http://www.videohelp.com/tools/AutoGK
Start up AutoGK and load the VTS_01_0.IFO file as input. This IFO file is found within the Video_TS folder of the dvd that you have ripped to the hard drive. On the Output File line, set a place on the hard drive where you want the avi file to go.
Moving down the window, select the English audio and a subtitle track if you want to include one. (subtitle usually not necessary)
Next, set an output size. I suggest using 1/3 DVD R, which will be 1493Mb. After that, click on Advanced Settings. Leave the width setting on auto, video codec on Xvid, and the audio should be CBR Mp3. Click OK.
Now click on Add Job. Then click on Start. When it finishes, you'll have an avi file that is compatible with the vast majority of dvd players that can playback avi files.