Yes, I had this same issue. I am using the same software. When the duration of the video exceeds ~ 1 hr 10 minutes you must split the ripping process into separate files. On the software, in the Title Configuration screen (the second screen) use the scissors in the lower right hand corner of the preview screen to select the first half (or third if it is really long) of the video. You then have to repeat the riping for the second half of the movie. You can do this by chapters for ease.
The advantage is you can also up the quality of the splits and still remain under 2 gb. I always max out the quality setting at 33.
Alternatively, you can take the single file (that ends early) you had created and use the MPG4 Translator program that came with the Archos. The disadvantage to this is you have added another conversion process that takes another hour and the quality drops dramatically.
I recommend splitting the files - name them Pt.1, Pt.2, etc.., creating a folder on your Archos to place them in, and finally selecting sequential video play within a folder in your settings. When you open the first part the second will automatically open when the first finishes.
Good Luck,
Tim