n00bs on Ubuntu published a guide about installing Plymouth Manager 0.7.4 on Ubuntu 10.10

You can use Plymouth Manager to Enable/Disable, configure and/or create a plymouth theme. All you have to do is click on the install button and the plymouth theme will be downloaded and installed. Removing a plympouth theme is just as easy as installing one. You can also create (and install) a simple plymouth theme yourself by clicking on the Create your theme button.

  Install Plymouth Manager 0.7.4 On Ubuntu 10.10 Maverick Meerkat