It would be easier to offer advice if you had divulged what Mac your are using and what version of OS X.
iLife System Requirements:
(Covers all versions of iLife)
and minimum speed for iMovie'08 on G4 is 1.9GHz and most iMacs was 1.8GHz - So to be able to "run" iMovie'08 on this one has to go a tricky way and might wonder if it's wort it.
You need an external hard disk - FireWire AND that have the ability tpo be booted from WesternDigitals do not work - Iomega does and soi LaCie.
Then on this external HD You must
• create a bootable system then
• find someone with a faster Mac eg Power Mac 2GHz or better and
• conned the external hard disk. Boot the Mac from it.
• Now install iLife 08 - and iMovie'08 will install
Then back to Your iMac - Now boot it from the external HD and You find that iMovie starts too (if 1.8GHz iMac) - BUT BUT BUT - it will run VERY SLOW - barely usably and iM'08 is far from a decent product - iMovie'09 and 11 are far far more better - BUT then You need a new Mac.
Yours Bengt W