You can't stop this behavior when two versions are loaded on the same
partition. However, if you haven't already installed service pack 1 for
Office 2007, you should go ahead and do this. The reports that I have heard
is that the wait time is significantly reduced.
One method to avoid this behavior is to install the free Virtual PC from
Microsoft, and then create virtual machines. However, you need PC hardware
that is fairly modern (fast processor, plenty of RAM [2 GB Minimum], and
plenty of hard drive space). You'll also need a licensed copy of Windows for
each virtual machine you create.
Microsoft Access MVP