VM Ware has a Coherence feature called Unity Mode. Switching to VM Ware is relatively painless. You will not have to reinstall Windows. Simply use the VM Ware too for migrating a Parallels Virtual Machine to VM Ware. Here is the link to download Fusion with a 30 day trial: VMware Fusion - VMware
And here is the link with instructions for importing a Parallels virtual machine to VM Ware: VMware: Team Fusion: VMware Fusion 2.0.2 Now Available: Import Parallels Desktop 4 Virtual Machines and More!
And here is an article comparing them: VMware Fusion 2 vs. Parallels Desktop 4: Lets Dance - TheAppleBlog
Trust me. This is not going to be difficult. And you are going to prefer VM Ware. BTW, VM Ware can be configured to launch the Mac programs when you double-click on a file, such as a pdf or Word file. To launch files from Outlook by double-clicking them, make sure the folder where Outlook attachments are stored temporarily is shared with the Mac.
If you need help, feel free to contact me.