I want a field like assigned to field in opportunities module. I have to assign an opportunity to 3 users 1verifier,1 sales agent and 1manager. But there is only 1 assigned to field.

Is there any workaround way for this.

I tried using created by select box and modified by but created by takes value of user who has created it(obviously) and it can be changed later but modified by always take value of user who has modified it(again obviously) Is ther a way i can kill this particular actions of created by and modified by select boxes and use them as normal select box like assigned to .

I have searched all over to create a new select box which would select users but no luck so far .everywhere people are having same problem. maybe i have to dig in a little deeper. BUT if anybody has a solution please reply.I don't care about the level of coding and customization it will take .If you know a way just reply.