how do I create a leaderhead for my new civ?

[arwen]

Reading this forum really got me enthousiastic about creating my own little civilization and now I'd like them to have their own leader, instead of "borrowing" one. Reading through these forums, this was the recipe I cooked up:

• Create .pcx files with a 255 colours for each of these:
    - in art/leaderheads:
      xx.pcx
      xx_ANG.pcx
      xx_CONQ.pcx
      xx_CONQ_L.pcx
      xx_CULT.pcx
      xx_CULTB.pcx
      xx_HAP.pcx
      xx_KISS.pcx
      xx_SHAP.pcx
      xx_SKIS.pcx
    - in art/Civilopedia/Icons/Races:
      civnameLARGE.pcx
      civnameSMALL.pcx
    - and in art/Advisors:
      xx_all.pcx
• Create .flc-files for my new leader in art/Flics
• Put these .flc-files in the civilizations-tab in my civmod.bic for all the different era's.

The recipe isn't as tasty as I hoped it would be: my new leaderhead doesn't appear in the selection screen in the startup of the game (where you can choose a civilization), but worse: the game crashes on me when I try to go to the foreign-advisorscreen
Can anyone tell me what I might've done wrong? Is there anything I missed?

*please help*