Ok, here are the original directions for keyboards with number pads:
bind "KP_PLUS" "+camin"
bind "KP_MINUS" "+camout"
bind "KP_UPARROW" "cam_yaw 180"
bind "KP_PGUP" "cam_yaw 225"
bind "KP_RIGHTARROW" "cam_yaw 270"
bind "KP_PGDN" "cam_yaw 315"
bind "KP_DOWNARROW" "cam_yaw 0"
bind "KP_END" "cam_yaw 45"
bind "KP_LEFTARROW" "cam_yaw 90"
bind "KP_HOME" "cam_yaw 135"
And here is my setup using the directional keys, INS, DEL, HOME, END, PGUP, and PGDN:
bind "UPARROW" "cam_yaw 180"
bind "RIGHTARROW" "cam_yaw 270"
bind "DOWNARROW" "cam_yaw 0"
bind "LEFTARROW" "cam_yaw 90"
bind "END" "+camout"
bind "HOME" "+camin"
bind "INS" "cam_yaw 225"
bind "DEL" "cam_yaw 315"
bind "PGUP" "cam_yaw 135"
bind "PGDN" "cam_yaw 45"
Just copy and paste whichever you want to use into the autoexec.cfg file located in the VTMB folder (this may vary depending on what version you have. For example, autoexec.cfg was located in GOGgames/VTMB/Unofficial patch/cfg for my game). For good measure, I also put it in config.cfg and default.cfg, and deleted entries that had the keys I wanted to use assigned to something else. Now if I could just figure out how to move the camera up and down.

I took a second look at this and fired up Bloodlines. Turns out it won't work for me, not entirely. I use the WASD keys to move around, and mouse look to look up and down and side to side. With the default setup, I can use the 4 and 6 on my keypad to pan the camera around to look at my character face on. I just have to keep tapping the keys to continue spinning around.
I might be able to use the second half of it - from the END key down. I'll have to experiment with it the next time I play the game for real.