Multiple domains

We have a range of domains, all very usefull...

[Block19Row13]

We have a site online with a very good established domain name that gets a visit from google on a very regular basis.

we also have 1 or 2 other killer domains that, if we able to implement would see outstading results for us, as the main key phrases we are trying to be found under are that exact domain.

we only managed to get these domains recently and as the site is an established company there is no chance of re-branding etc.

so, as if you didnt know it already, my questions is:

How do we have the same site listed with a primary domain of www.mysite.co.uk and 2 sub domains of www.mysite2.co.uk and www.mysite3.co.uk WITHOUT being severly punished by the major searc engines.

if there is not a way, then fine, i just need to know

thanks

ps. all domains listed are fictional

[brixton]

hm... i know some guys they are top of pops they have dot coms and dot uk's same page same content same bl...dy cr.....p they are obviously the greatest spamers they are listed at the top 10,that makes me to believe 1:or they have people inside google or 2:...i do now what....unfortunately because of the TOS i can't tell you the domains,but the uk guys maybe they know them.....in the big money KW.s........

[Block19Row13]

so i suppose its better to be safe than sorry.

its a shame that its come to this because our domains are intended to get people to us easily as they are 100% relevant to what we do