for the latest version of second gen android. there are about 10 to 12 files and the disk size is about 500 MB or more.
If any one will be interested I will send him the file in SD card or some thing.
the procedure will quite lengthy and sequential. its not like plug and play.
keep in mind during the procedure of firmware upgrade all your data/settings will be lost because you will have to do a factory reset after the update or the update will not be effective.