Views 3 (D6) memory limit issue

On a Drupal 6 site, I updated Views from v2 to v3. The Data Export module 6.x-2.0-beta4 seems to work with it, generally speaking. But, some of my bigger Views with "All Items" selected (for "Items to display"), the CSV export button brings me to the Drupal BatchAPI screen, pauses, and then redirects to an error page saying that it ran out of PHP memory.

I saw this issue: #1435200: 6.x-3.x-dev (2011-Nov-25) not supported, which seems to suggest that the 6.x-3.x branch of the Data Export module was made to work with Views 3... but that it has been abandoned.

I need to get this working, and I plan to dig into the code myself to fix it... so I'm just looking for some guidance on where to start, if you can provide any. When I first started the upgrade to Views 3, I didn't notice that Data Export had a 6.x-3.x branch, and just assumed that the 2.x would work with Views 3. Can you provide any insight on what the main differences would be? And if you have any idea what might be causing the memory error I'm seeing, that would be great!

Will report back soon...