No offense OP, why didn't you just turn the PSP on and see if they worked?
It's trial and error man but yes NO LOADER. They used to require one when devhook was first around, however now with CFW you don't require that. Make sure you're new games are patchedfor 5.00 M33, or you have the 6.30 plugin setup and enabled to run new games.
I reccommend that plugin (Torky's M33 plugin) or 5.50 GEN D3 Final.
Devhook wasn't a requirement to play ISO's...in fact they worked the same as they do now. All Devhook did was enable you to run ISO's that required a firmware above the 1.50 you were running by "emulating" that higher firmware (btw Dev is short for Device in this case), kind of like what we do now by patching modules.
Also neither Torky's plugin nor GEN D3 Final are god places to be if you want to run new games. Either grab ISO Tool and learn about 3 button presses, or update to Prometheus firmware. (i favour the ISO Tool method myself).