For anyone interested in the early days of DMA Design (and right up to Grand Theft Auto 3/Rockstar take over) then noclip have put out this brilliant documentary covering key points and interviewing people who worked there at the time, there's a lot of interesting facts and small details revealed in this so if you have the time (it's 1hr12m) then it is well worth checking out:
You can watch a teaser here to get a quick example of what's included:
You can watch a teaser here to get a quick example of what's included: