Compression Test Q

[GasSavers_James]

I am going to do a compression check on my vx in the next couple days...its been a while since ive done it...and that was on a vw. I know how to take the plugs out, and i have the plug wrench.
Do you do a comp. test with the engine warm?
To keep the engine from starting do you just remove the distrib. cap?
I figure if there are any problems, i can have the mechanic look at the assoc. valves when he replaces the timing belt in a few days.