Help Converting File

Poser can export as an OBJ file which can be used by most slicers.

Say for instance I need the scale parts to 1:144, is there a way in the system to set it up for that specific scale?

not in that manner specifically, no, there is not.

slicing programs typically work on a percentage.. i have yet to see one that allows a specific "size" input. (disclaimer: i do not use resin printers, so not sure about their systems)

if you know a given size - say overall length - you can use a program that does allow actual dimensional inputs to create a dummy piece of the correct scaled size.. there are many free programs out there that will allow you to do that.
Be aware that 3d printers default to metric measurements - that is their native format. So any measurements in inches/feet should be converted to metric for best results.

Blender does not have specific units of measurement.. 1 can mean 1in, 1cm, 1ft - it is all relative.
As an example.. I have been working on modeling an old pickup i used to own in Blender.. when i started, i did not really care too much about the actual scale... I was more interested in getting the proportions correct, using various photo angles as reference in the background...

I got to a point with the modeling that it was time to check the scale. I want it to be a 1/10th scale model for building an RC out of it.
To do this, I used 123D Design - that does allow specific measurements to be used when modeling something - to create a basic wheel/tire combo in the correct scale size, and imported that into Blender.

This is what it looked like initially....

as you can see.. the wheel/tire looks HUGE compared to the truck body... yet it IS the correct scale - the truck body is not.

Using that wheel/tire as a reference I scaled the body up so that it looks correct. Scaling in Blender is pretty easy when you have a good reference in place. and this is where it is now. (wheel/tire model was not changed in any way and is on a separate layer, as is each part of the truck model - bed, cab, door, etc)

all of that said.. 1:144 scale is gonna be pretty tiny, and does not lend itself well to FDM printing. for something that small, I would suggest having the parts printed in resin to get any kind of detail out of them.

the printer used has very little bearing on slicing input. a single slicing program can be used on a wide variety of printers - they just need to be configured for the printer being used.

I do not personally know of any slicing program that takes actual dimensions for scaling a model. the ones that I know use percentages for scaling.

you might be able to print the hull of that ship ok (in sections), but the details - things like the guns, railings, and even the life boats - will not print well on an FDM type printer at that scale - they are just too tiny.

just because there is a 3d computer model of something does not mean it can be easily 3d printed - this is what you need to understand.

There ARE limitations to what you can do with an FDM type 3d printer such as the Crealty you mentioned. There is NO FDM type printer that would be capable of printing those tiny little details successfully.

An SLA/DLP type printer might be able to, depending on the quality of the modeled parts, but they would most likely be prone to breaking easily due to the tiny size.

I dont know what ship that is supposed to be, but if you know the name of it, you can google it and find out more details, like gun size, then convert that to 1:144 scale and you will maybe understand just how tiny it is.

as a very quick example.. say something in real life is 8 inches long.. converted to 1:144th scale that would be 0.05556 inches.. just over 5/100ths of an inch - or taking it to metric, it would be 1.4mms long - that is TINY in 3d printing terms.

8 feet would be just over 1/2" in that scale, or 16.9mms...

are you beginning to understand yet?

(and for what it is worth, i would not consider the above mentioned printer "high precision" - those are marketing hype words)