I get an error message with when i tried updating my iMac to the latest firmware update 10.5.5. It something to with the hard drive. I am not sure if its the space as i have got 35Gb left. 
Spec for my mac:
2.4 GHz Intel Core 2 Duo
2Gb ram
320 HDD
20" screen
Once i couldn't get the software updated through the apple software update i tried to do it manually, but no luck their either. Would really appreciate you anyone could help me through this.


Thank You!
Have attached a the snapshot of the error msg when i install manually.
PS: would appreciate if you could send the reply to mystryguy_18@yahoo.com
Spec for my mac:
2.4 GHz Intel Core 2 Duo
2Gb ram
320 HDD
20" screen
Once i couldn't get the software updated through the apple software update i tried to do it manually, but no luck their either. Would really appreciate you anyone could help me through this.
Thank You!
Have attached a the snapshot of the error msg when i install manually.
PS: would appreciate if you could send the reply to mystryguy_18@yahoo.com