Vegas2 on two pc's with same cd possible?

Hi, this is probably a really noob question but I just wondering if it is possible to install vegas2 on two computers with the same original CD/cd key and still be able to play co-op? If the game requires the CD to be in the drive while playing, can you use a crack, or does this company only allow you to use one cd/per computer at a time. The reason I was asking is that I have already ordered one copy and am just waiting for shipping and so I wanted to know if I would need two separate copies of this game in order for multiplayer/co-op to work. Thanks in advance for the help.

actually you probably can

i use one cd to play doom 3 on two computers

and this is how i do it:
i install the cd on both computers

i then start the cd on one of the computers

after that application is up and running i take the cd out of the drive and put it in the other computer and start that computers application.

i dont think you should try and play multiplayer though
with crysis you absolutely have to have two different cds, but only need one version to play on LAN