Resolved window 7 and vista dual boot

hi.am new here .
here is what i like to know .
i have window 7 on one drive now .
i want to install vista on a other drive .
here is my question .
to change from window 7 to vista do i just turn off my computer and disconnect the red cable from the drive[window 7] and connect it to the other drive [vista] .
am new to computer and i cant not use partition .it is to advanced for me .
thank .
sorry about my spelling am french .

 

thank for your help .
i register here yesterday thinking to get help a little .
but i thing that i know more the all the members here .
if you like to know any thing just ask me .
by the way in case you don't know how to reply to a thread .you see the big square at the bottom of the post this is were you answer

 

very good to know .
i thank you very much for your answer .
but it will impoosable for me to do it because i have window 7 installed all ready on a new 500 drive .
so what you are saying is i would have to vista fisrt them window 7 .
what if i install vista and up grade window 7 after is that work .
sorry i don't know much about computer .
if not i will do it by turnning off my pc and disconnect w-7 and connect vista .that way i will not get into trouble .
then just use one of them for a month or so at the time .
i will not go it my self .some one will do it for me so maybe he know what to do .
thank again .

 

thank you .got it .
i will get some one that is really good at that .
really it is only a pass time for me .
nothing more to do here .at 66 you need to do some thing to pass the time .
my computer did crash on me last month .it cust me 366.00 to fix it .
new led power supply .2 new one gb stick .
new drive [500]then window 7 .
and that time it was my drive .but now i have a new pc .so i will install vista on my new drive [250] comming in next week .
plus i have 5 led fans and 4 laser light it look really good now .