To add new peds, use fastman's limit adjuster plugin.

Here is a tutorial:

https://www.youtube.com/watch?v=KSzGUf1qMMo&ab_channel=WhamDieMoe

Add this line into peds.ide file.

***, DNFYLC2, DNFYLC2, CIVFEMALE, STAT_COWARD, sexywoman, 1000, 0, man, 2, 6, PED_TYPE_GEN, VOICE_GEN_DNFYLC, VOICE_GEN_DNFYLC
***, HFOST3, HFOST3, CIVFEMALE, STAT_STREET_GIRL, woman, 1000, 0, man, 9, 3, PED_TYPE_GEN, VOICE_GEN_HFOST, VOICE_GEN_HFOST


Don't forget to enter ID you want ped to have.