- I'll change the internal HDD. What's the maximum size I can get ?
Maximum size physically is 9.5mm(unless you destroy a part of the ps3 to let that fit in there)
The HDD DigitalDeviant posted was 12.5mm.
Try either
http://www.amazon.com/Western-Digital-Scorpio-Notebook-WD7500BPVT/dp/B003D18DM0
http://www.amazon.com/Western-Digital-Scorpio-Drive-WD5000BEVT/dp/B001JSSDGU
http://www.amazon.co.uk/Samsung-640GB-Cache-5400RPM-Internal/dp/B0031M9JCE/ref=sr_1_1?ie=UTF8&s=electronics&qid=1277129744&sr=8-1
As for size in terms of TB, probably 3TB max (note probably), but 3tb 2.5"/9.5mm hdd hasn't been made yet.
- How many backup loaders are available, and which one has the best compatibility ?
Depends on which fw you are on.
If the ps3 comes with 3.55, I suggest you install 3.55 kmeaws cfw (instructions via google)
If the ps3 comes with <3.5 then you could just jailbreak it and play that way.
As for backup loaders...for kmeaws 3.55 cfw
Multiman v1.13.00
Gaia Manager v2.02
Both have their ups and downs.
- Is there a .ISO loader ?
No.
The backup loaders load up files that come from the disk.
They just rip the files of the disk and store it on the hdd.
http://www.google.com/