1. You have in principle two basic choices - either to go with one of the dedicated dongles where you'll be then depending on the manufacturer / seller to supply the updates for it unless it's also compatible with free versions of hex code / payloads or go for one of the universal / dev boards or dongles like Teensy, Minimus AVR, blackcatUSB and so on - have a more read here http://www.ps3news.com/forums/ps3-ha...ds-112429.html
2. No - it doesn't - it's just located on another local servers otherwise exactly the same - you can download it even directly from our forums here http://www.ps3news.com/forums/downlo...o=file&id=4285 (fixed one) - MD5 is e07d2b84c9e9691c261b73e5f1aada20 - more info here http://www.ps3news.com/playstation-3...s3-hdd-issues/
3. Yes is PLENTY of instruction and help in the whole hack section here http://www.ps3news.com/forums/ps3-hacks/ and you can start reading our Q&As here http://www.ps3news.com/forums/ps3-ha...ne-112385.html
Hope this helps.
Don't be affraid to use forum's Search function - it's your best friend around here - never sleeps