How to find png numbers for draft players

I'm having trouble finding png numbers for certain players in the draft classes I downloaded. Can anyone help me out with that please

Get the Turbo Trainer, go to the roster, edit player, alt-tab, open the Turbo Trainer, click Player then Vitals. In the middle are three ID numbers, the top one of which is the cyberface, with the number corresponding to the png file number.

Yes, but how to export players from draft class to roster?

do you have to download turbo trainer

RED MC with a paid license can open Association files and edit whatever tabs you license it to edit.
So you could load an association with a roster, import the draft class
Open it in RED MC, copy all the tabs you can edit
import those tabs into a roster file, assign rookies etc after that.