Item description:

first save listed as Gold Bolt in the zip, see this:

Collecting that will pop the trophy related to collecting all Gold Bolts.

Now the second save is the real time saver, you should be very close to the fight with Qwark. Check the cheats menu and throw on Invincibility if you would like (don't turn on infinite ammo) and then groovibomb Qwark for the Death by Disco trophy.

After, switch to the Fusion Grenades and throw them until they hit level 10, potentially popping the trophy for all weapons reaching maximum level. After that, if you proceed to go and beat Dr. Nefarious I was think it will pop the trophy for beating it on challenge mode as well.