Ok so you have an issue with memory.
One solution is to "archive" some other programs so you will move them inside the flash memory which is separated from the ram memory (see the memory menu with 2nd Mem). Archived programs can't be run (if they could, it's not programs but applications :D). But you can install zStart to run archived programs or you could also unarchive them before execution.
Antother solution is to compress your programs. You can use crunshyOS from Dan Weiss or Omnicalc from Michael Vincent. There's probably some other tools to do the same job but I can't remember their name.
Hope this helps :)
