Putting two UI's together - Help Me :)

[Kyriel]

Okay well, i downloaded the "complete set" called Yafs for the UI, but I want a new XP bar. I downloaded "the Incubi EXP Bar". If I load only Yafs, the XP bar wont show, if I load only "Incubi EXP Bar " only the XP bar shows.

How do I load the XP bar with the Yafs complete UI? If anybody could be so kind to lay a how-to step-by-step for a complete noob, that would be wonderful.