Cases Only Dataset

[VIJAI JAI]

I have a plink file on 1000 cases.
I also have a list of rsIDs of 25 SNPs that are genome-wide significant and with OR and pvalues.
I wanted to know if I can run PRSice on this data to generate a PRS per individual to create the standard histogram plots.

PRS=β1x1+β2x2+…+βkxk…+βnxn

I just wanted quantiles of PRS and deviations from mean PRS (of the cases).
At a later date, I plan to use controls too. but for now, just needed for cases-only.
Is this possible?
Thanks
Jai