k800 dead , gdfs problem

hello topsony users , I have a k800 cid53 with a gdfs problem , the phone starts with white screen and stucks like this. The only solution for me is D-Uunlocker but I don't have a verified paypal account! These is what I need to know..
1) can I pay with credit card without paypal verfied account?
2) I have a GDFS backup in .bin format , can I restore GDFS from this backup?
3) If I check GDFS reconstruction can I check can I downgrade to cid52 with only one log? or it needs 2 logs?