Need help with some dumb questions.

[Nerdgunner]

I have been using swap magic and hdadvance 2.0 to play my backups for a few years. This morning i accidentally broke my disc drive with the stupid slider tool for swap magic. So i decided to cut my losses and buy a new premod ps2. A DMS4 Pro chip installed in a slimline. With that i have a couple of questions im curious about having only done softmods thus far.

1.Can you backup a dvd9 game onto a dvd5 disc using dvdshrink like you would any dvd movie?

2.For 2 disc games are there any problems with switching the discs if theyre backups?

3.Are there any games that have copy protection that restrict you from making a backup of your game? If so can they be bipassed using software like dvd43 or Anydvd?

4.Do any games have ingame errors when playing from a backup on the dms4 chip, for example: On the HDAdvance software when running Kingdom Hearts II from the HDD whenever you go to change worlds the game freezes, or Suikoden IV where if you try to load a game on HDAdvance it freezes?

5.Has anyone ever found any game that could not be played as a backup on the DMS4 chip system or could not be backed up at all?