using pcui

I would like to learn about the options of running pcui applications.

I know you can run the select.htm page from CRM_BSP_FRAME through SE80, but this option is not very user friendly and cannot be used for end-users appearantly.

I also know that you can call bsp applications from EP.But in that case you have to deal with the EP customizations first?

Is there any other way to run the PCUI, like entering an url and directly access to PCUI pages?

Thanks for your help.