Some good tips here on configuring OpenOffice's memory footprint and startup speed.
- Turn off the JRE
- Undo
- Number of steps = 20 (or fewer--most of us don't use that many)
- Graphics cache
- Use for OpenOffice.org = 128 MB
- Memory per object = 20 MB
- Remove from memory after = 00:10 hh:mm
- Cache for inserted objects
- Number of objects = 20 (or try fewer)
http://openoffice.blogs.com/openoffice/memory/index.html