What I have to do to play my dvd backups???

Without knowing the modchip you have to try it out - I can't tell you if it will work.

1 Search on the keywords "DUST2DUST BOOT"
2 Note the instructions for booting DVDRs with NEO2.2
3 Get AR2/1.7 or 1.9 (only) and a DVDR.
4 You will also need a PAL DVD original with large Table of Contents (Dead on Arrival or Devil May Cry)
5 Follow the instructions noted at step 2

If it works, fine. If not, change modchip to NEO2.2