Noob Q: How to decrease DivX size?

Hey, I just went through Acclon's guide, and I'm a very happy camper indeed!
That thing is damn well written if even a noob to DivX like me can get it to work. Kudos!
Having pretty much no idea which VirtualDub settings will result in a lower file size, I put the question to you guys.
1. The fact that I set DivX encoding to 1 pass instead of 2 passes will result in a lower quality, but will take less time to encode, correct? How about final file size?
2. Just about how much smaller will the file size get if I decreased the 200 kbps setting by 10% - i.e., is 200 kbps is the lowest recommended setting?
3. Any other tips?
I can live with jaggies and compression artifacts. I have a 128 meg SD card with about 70 megs free - the rest I need for apps installed for work. Is it reasonable that I want a 90 minute movie crammed into this space?
Thanks!
[edit: removed typos]

Having pretty much no idea which VirtualDub settings will result in a lower file size, I put the question to you guys.
1. The fact that I set DivX encoding to 1 pass instead of 2 passes will result in a lower quality, but will take less time to encode, correct? How about final file size?
2. Just about how much smaller will the file size get if I decreased the 200 kbps setting by 10% - i.e., is 200 kbps is the lowest recommended setting?
3. Any other tips?
I can live with jaggies and compression artifacts. I have a 128 meg SD card with about 70 megs free - the rest I need for apps installed for work. Is it reasonable that I want a 90 minute movie crammed into this space?
Thanks!
[edit: removed typos]