Ultra MOD joiner is the best MOD joiner. It can join MOD video files perfectly. with this MOD joiner, you can also join MOD with other video formats together, such as join MOD, WMV, RM, MP4 with AVI, this MOD file joiner also support join video files to VCD, SVCD, DVD image files, and then you burn them into your VCD/SVCD/DVD disk. with this MOD joiner you can even convert video files to other video formats you want.
Guide: How to use the MOD Joiner - MOD video file joinerStep 1: 
Free download MOD Joiner and install it on your computer.
Step 2:Click 
Button to select the video files you want to join, you at the same time add different type video such as join AVI MOD MPEG RM one time with this MOD Joiner
Step 3: Edit the source MOD video files, if you like.
Click
button to edit the selected file, you can set the start time and the end time, as the following picture :
Step 4: Sepcify the directory for output files by clicking the 'Change...' button, or just use the default directory (Note: after successful join, please click Open button to find where the file stored, if you try to find the converted file via other way, you may can not see the joined file)
Step 5: Sepcify other settings for advanced user, you can set output quality, frame rate, TV type, Aspect Ratio, Add letterbox and so on.
Step 6: Click
Button to join the MOD video files.
After successful join MOD video files, the joined video files shall be stored in the folder you have previously selected. Download free version
Convinced? 
Buy full version $34.95 now.