Using Impulse in the way to install the programs. Not difficult, but don't rush it.
As was suggested before, register Object Desktop Ultimate with the information in the email you should have received.
Once you do that all of the individual programs should and will show up under the My Desktop tab. WindowBlinds will need a reboot of the computer after install. I really can't remember if others will, if you do need to it will prompt you.
On your BootSkin problem, don't know what to say other then whether you run XP or Vista you can have problems with BootSkins.