Fortunately the Upgrade Kits have a clean copy DVD of Windows 7, so you can back up your files, boot from the DVD, select Custom install, use Drive Options (advanced) to delete all partitions, create New as you wish, then format before Installing to first partition.
Any Vista recovery partition is disabled when Windows 7 installs so you can delete it. If you failed to make your Recov disks first, try tapping the key given for Recovery on first bootup screen. If it doesn't start recovery then that is just wasted space.
The installer is mostly driver
-complete, with more arriving soon in Windows Update. Any drivers
missing in Device Manager can be found on the Acer driver/apps CD included in the kit, along with favorite apps you want. Others can be found on the Acer Support Downloads webpage for your model.
As with Windows 7 on your laptop, you own the copy of Office for life and can reinstall it as often as you wish as long as you save the key. Make of copy of the CD or extract the .iso using ImgBurn to backup.
When complete, save a Windows 7 backup image to a primary partition and externally so you never have to reinstall again, just reimage the HD or a replacement using the Windows 7 DVD repair console.