[muflyer]

I am relatively new to Macs and would be grateful for any assistance anyone can lend on this.
I am looking to clear space on my iMac to add Tiger and iLife 06. Since I don't yet have an External HD, I am trying to clear space on my drive by backing up my iMovie files to DVD. Is it possible to burn iMovie projects that are bigger than 4.7 GB (4.3 actually) to DVD-Rs? If so, how? If I do burn to DVDs and need to use more than one, do I just insert multiple discs without losing any data? By dropping the whole project onto a DVD-R, I assume this is in a data disc which won't play the movie, but will preserve all the shots, audio, transitions, etc in the project which can subsequently be imported and used again, if necessary? Thanks as I appreciate any assistance anyone can lend.

[albloom]

I haven't done it, but my Toast 7 manual (page 68) says
it'll do the job for you, supplying compression as needed
to fit on a single-layer DVD-R.

[muflyer]

Can I save over multiple discs the data from these files? If so, do I simply drag and drop or do I need to use a certain program to copy and how do I resurrect the data if I need to access it off the discs? Thanks!

[albloom]

It's called "disc spanning" in Toast. When you make a
data disc (Mac Only option), "Toast will automatically
span the data aross multiple disks." Further from the
Toast 7 manual "Each disc in the set contains an index
of the contents and location for every file and folder
in the set." There's also a little app (Roxio Restore)
for retrieval of "an individual file, a folder, or the
entire set."
Seems that Toast'll do ya.