Yes, he is qualified under 245i (you too). The priority date is the most important date for 245i. He just needs to show proof of presence for Dec. 2000.
You might/should be able to adjust with him under CSPA. The best thing to do is to consult with a lawyer before filing any adjustment papers but since they are working on Jan 2001 and your father's PD is 4/30/2001.. I'm thinking you might qualify due to the amount of time the I-130 was pending.
GL! My sis' case is under review to see if she is still considered "a child" for immigration purposes.
http://immigration.lawyers.com/ask-a...sues-7545.html
I'm not sure how accurate the
calculator found here is but you can try it (I've been reading up on this for the past few months lol).