I do. The only conflict is between Outlook. You can only have one Outlook. All the other applications co-exist fine.
i installed office 210 beta 2 ultimate edition and it messed up my office 2007 enterprise i have a fully legit office 2007 ultimate (botted clubbing.com ) but i use the prateed version becaseu it dosent have the 3 activations limit and it already has all the updates slipstreamed into it. but anyway office 2007 started saying that it wasnt genuine then i reinstalled win 7 and office 2007 but DIDNT install 2010 and its fine again so if you have pirated office 2007 and you want too install 2010 beta DONT DO IT!!! until after you uninstall 2007
All Office loaded all my versions of office into 1 machine Office 2000 Professional Office XP Professional Office 2003 Professional Office 2007 Ultimate Office 2910 Beta *They all work at the same time with no conficts *The Default outlook will be the of the very last one you installed *Tested with bot Legit Keys and Pirate Keys *Takes a little bit more time to load (extra 2-5 seconds)