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.

***, SWFYBU, SWFYBU, CIVFEMALE, STAT_SUIT_GIRL, busywoman, 1000, 0, null, 4, 6, PED_TYPE_GEN, VOICE_GEN_SWFYRI, VOICE_GEN_SWFYRI
***, WMYRI2, WMYRI2, CIVMALE, STAT_STREET_GUY, man, C, 0, null, 6, 9, PED_TYPE_GEN, VOICE_GEN_WMYRI, VOICE_GEN_WMYRI
***, SWFYJG, SWFYJG, CIVFEMALE, STAT_COWARD, jogwoman, 1000, 0, beach, 9, 9, PED_TYPE_GEN, VOICE_GEN_WFYJG, VOICE_GEN_WFYJG
***, WFYST3, WFYST3, CIVFEMALE, STAT_STREET_GIRL, sexywoman, 1000, 0, null, 4, 6, PED_TYPE_GEN, VOICE_GEN_WFYST, VOICE_GEN_WFYST
***, SWFYBE, SWFYBE, CIVFEMALE, STAT_COWARD, woman, 1080, 0, beach, 1, 4, PED_TYPE_GEN, VOICE_GEN_WFYBE, VOICE_GEN_WFYBE




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