You need to delete some files ASAP. Best to have greater than 2gig of free space. Many posters to these forums state that you need much more free space: 5 gig to 10 gig or 10 percent of you hd size.
Be careful when deleting files. A lot of people have trashed their system when deleting things. Place things in trash. Reboot & run your applications. Empty trash.
Go after large files that you have created & know what they are. Do not delete small files that are in a folder you do not know what the folder is for. Anything that is less than a megabyte is a small file these days.
"The simple, fast way to save disk space"
OmniDiskSweeper is now free!
This will give you a list of files and folders sorted by size. Go after things you know that are big.
These pages have some hints on freeing up space:
Buy an external firewire harddrive.
For a PPC computer, I recommend a firewire drive.
Has everything interface:
FireWire 800/400 + USB2, + eSATA 'Quad Interface'
save a little money interface:
FireWire 400 + USB 2.0
This web page lists both external harddrive types. You may need to scroll to the right to see both.
Buy a flash card.
This will save you a gig of space.
Monolingual is a program for removing unnecessary language resources from Mac OS X,in order to reclaim several hundred megabytes of disk space. It requires at least Mac OS X 10.3.9 (Panther) and also works on Mac OS X 10.4 (Tiger). It worked for me on 10.4
A detailed write-up on how to use Monolingual:
What was the hard drive capacity to begin with?
The figure I've seen bandied about is 15% should be left as available space.
The X Lab recommends a bare minimum of 10 GB of free space and has some tips on freeing up space: