So how would you re-create the basic gang member from "Incident at Absalom Station" as a HLO NPC?
Start by creating an NPC, and then open that new character.
Start on the Character section, profile tab.
Set either "Level 21 Crew Gang Member" or "Downside Kings Gang Member" as the character name
As the alignment, choose LE if this is one of the Level 21 Crew, or CE if this is one of the Downside Kings.
Move to the race tab
Race: Custom Race
CR: set this to 0 - looks like there's a bug, and we're not currently displaying the text version of the CR (for a simple implementation in HL, 0 means 1/2 and -1 means 1/3)
Size: leave at Medium
Adjustments to use: ignore this one - it won't alter anything since this character doesn't have both a class graft and a subtype graft (that this is being shown is a bug - it should be hidden unless there's both of those types of grafts on the character)
Languages: Common
Array: Combatant (since the AP doesn't have the combatant/expert/spellcaster symbols you'd see in alien archive, you have to guess at this, but it's simple enough to delete it and add a different one if you find the final stats don't line up).
Creature Type Graft: Humanoid
Click on Humanoid, and choose Reflex save as the one to get the +2
Creature Subtype Graft: Human
(there's a bug here - there's not a checkbox available to set this as a human race character, but if that were working, you'd click on the subtype once you added it, and check the "Human Race" box)
no class graft or template graft
Now, to the Abilities section, Ability Score tab
Set the bonuses for all the ability scores to what's listed in the statblock
Skills Tab
Set Perception to Master (note that in Starfinder statblocks, Perception is not listed among the rest of the skills, only at the top).
Athletics: Good
Bluff: Good
Intimidate: Master
Stealth: Good
Next, to the equipment section, weapons tab
Add an azimuth laser pistol
Add a club
click on the club, scroll down a ways until you find the Archaic weapon special property, and un-check its checkbox (as a reminder, Archaic weapons deal -5 damage to opponents wearing non-archaic armor, and since almost everything in the game falls into that category, in HL we apply that damage modifier by default, but in Paizo statblocks, they don't, so for archaic weapons, you have to turn that off to make the statblock match)
Armor tab
Add stationwear, flight suit
equip the armor
Now that all the basics are in place, on the top right of the screen, find the gear icon, and click that. Choose Generate Statblock, and once that comes up, click "Preview HTML" at the bottom.
(I noticed a bug in the statblock - it's not updating every time you open the statblock window - you apparently have to switch to text or BBCode or WikiText, and then back, in order to get it to update)
Okay, looking through that for mis-matches
Init is +4 in the statblock, +3 in HL
Perception is +10 in the statblock, +9 in HL
Bluff is +5 in the statblock, +5 in HL
Stealth is +5 in the statblock, +4 in HL
So, to apply those adjustments, go to the Character Section, Customize Race tab, and find Initiative on that - add +1 to that, so that it's +4.
Then, Abilities Section, Skills tab, click on Bluff, and find "Other Skill Bonuses" - set that to +1. This appears to be bugged right now, because it's not adjusting the final value, but that's on our to-do list.
Repeat that for Stealth and Perception.
Another bug is that you can't easily set the amount of cash the character is carrying.
Other than the bugs I've mentioned, I believe the statblock HL generates should now match the statblock in the book.
As an alternative to adjusting three different skills, you might choose to add the "Skilled" ability on the Character section, customize race tab, in the "Adjustment Special Abilities" table. That will take up the unused ability slot that this character isn't making use of, and will make three of the character's 5 skills match, but it will create a mis-match on Athletics and intimidate. I'm not sure what the adventure writer meant to do here, when this NPC was written, and I'm not sure which of those options is better to make HL match what's listed in the book, since the character in the book isn't exactly following the recommended skills and abilities from the NPC creation rules in AA.