For Spacecasespiff ...
There must be an error in your Launcher Pro and/or the Home Switcher. My recommendation is to uninstall both, do a battery pull (battery out, wait at least a full minute, re-install and turn on.). Then reinstall both. After this, you might consider doing another battery pull, just to settle things in. There SHOULD be an option to make one or the other the default.
BTW, if you don't have the paid version of LP (Launcher Pro PLUS), this might be part of the problem. The Plus version has a lot more options. Also, make sure you dl the icons pack for LP (free).
I have LP+, icon pack and Home Switcher ... and all work flawlessly, with the option to make stock or LPP the default.
For El Jefe...
After you dl Launcher Pro (again, I recommend the PAID version - Launcher Pro Plus) and Home Switcher, clear off your stock home screens of all icons and widgets before using LP+ ... for the reasons I mention above.
After you dl both apps (and the LP icons pack), you will open Home Switcher, select LP+ as your default. You will have to set up the screens again for LP+, but you will have a bunch more options AND you can back them up using a function found in the LP+ preferences. Some Moto widgets don't work well with LP or LP+, but Launcher Pro has a bunch of widgets that are even better than the stock ones. There is a LP widget called "People" that will have pix of your selected contacts and, at a touch, present options to call, email, text, see their listing in contacts.
The best part of LP+ is the revolving dock. Check the thread on LP+ for more.
See the thread in this forum on LP+. Lots of ideas there as well as in the thread on pix of home screens.
PS - The Home Switcher listing on the Market says it won't work on 2.2, but it does.