there are 15in rims on my 2000 sentra SE, but I want the 17in stock rims that are on the Spec V. Are they the same lug type, would they fit

I know 17's will fit on the sentra. However I'm not sure if they are the same lug size. As long as they are 4 lug you should be fine

they are 5 lug they wont fit
get the SE sport package 16s
4 lug and they are the same as the SE-R(non specV) rims