fb7d1f71__Walkthrough_by_metzomagic_com__Why_and_How
[Who] Virgil [Where] Crash Site [Why and How] 
You have little choice here as to whether Virgil joins you or not. However, Virgil is nearly invaluable as a healer, and he has much to contribute throughout the game regarding advice on various situations that arise. I would recommend keeping him with you till the bitter end :-)
Arcanum Walkthrough - Just One of Many Reviews on this Website Walkthrough by metzomagic.com
Why and How