yes

yes u can use US account and play that dlc (if redeem on another psn account).
do u use hdmi cable? auto settings or manual?
sometimes sata connection can screw things up... ps3 tends to reset then ask for reformat 

a buddy of mine got new ps3, so unlucky that the sata chipset was faulty and the console sent back to Sony. They changed whole motherboard, then all his psn games on hdd all gone (due to ps3 reformat with new hardware id)

maybe

if prob persists, then it might be sata connection prob... worst is the chipset prob (if faulty)

for what model ? and problem ?

First question, fifa street downloaded used which PSN account? main account? share account (example: bought from terion)?
If the game downloaded used main account, then the game can't playable once you de-activate your main account from slim PS3.
If the game downloaded used share account, just leave the share account at slim PS3 and activate the share account once complete the transfer process.

For winning eleven, the buyer can't play online unless you keep your main account activate at slim PS3.
Backup utility is useful for restore file to same PS3. If use backup file to another PS3, all copyright-protected file and copy-protected save file can't transfer to new PS3. If want transfer file from one PS3 to another PS3, better use transfer utility, then all contents will transfer from old PS3 to new PS3 including copyright-protected contents.
I don't think you can recover corrupted file using Backup utility or transfer utility.

You can restore the backup file from old PS3 to new PS3, but will miss those copyright-protected contents (example: video) and copy-protected save data. So, you can't get exactly same contents as old PS3.

If YLOD PS3 (early stage only) still can turn on, then you can do transfer. If YLOD PS3 totally dead, nothing you can do.

I think those save data are copy-protected, so can't restore at new PS3. (not 100% sure, you can try restore, but don't put high hope on it).

Rm2xx to 3xx...

Go to the official website. Should be a link somewhere. Download it into USB drive (or HDD as long as it is in FAT32 format). Load it into PS3 and select Update via USB.

nop... u can't start the game... autoupdate patch by itself