Why would you do this, GPUs that old have insignificant compute power and abstraction/translation would make things even worse. Wouldn't be worth maintenance/power costs
even if you have free electricity the issue would be the great time involved into working with very old and small if any possible hashing!
unfortunately the crypto world evolves very fast and what one used last year is considered obsolete in the crypto world!
i actually was mining in early 2010 and from then till now the resource requirements even to begin to mine are huge! it is unfortunate but doing things the right way will also keep you updated with hardware and software! the resource requirements of today would burn most of the older hardware and that is also including cpus