In CK I can find Aela the Huntress and Farkas but, for the life of me, can't find majority of the other ones! Where can I find Lydia or Illia or Jordis the Sword-Maiden? Oh and while I am at it.... is there a utility which would allow me to combine multiple .esps?

When you say "where can I find", do you mean in terms of the cells they spawn in, or on the item list?

(Since they're housecarls, I don't think they start in the world, but are scripted to spawn after quest completions.)

Lydia's Editor ID is: HousecarlWhiterun... just use housecarl as the searchword and you will find them
If that's what you were asking about

Thanks aBaDmAn! Found her! Now is there any way to remove her default armor in CK?

Jordis is the Housecarl in Solitude

Yes I have just realized that! Call it brain-fart Found Illia too but she seems to be bugged. You can't see her face or body in editor.

Yes. Go into her NPC record, into the inventory tab, then into the default outfit pull down and set the default outfit to none. Be aware that doing that will leave her naked before hire and when she returns home without you.

A dev talks about why it happens in http://www.gamesas.com/topic/1344163-is-there-a-way-to-disable-the-defaultoutfit-for-a-specific-npc/, which means you can get around it with scripting.

Thanks IIama!

Is it just me, or is all of the actor's form ID in the CK different from what I see in game?
Ie... Alea's in CK = 0001a696
Alea's in game= 0001a697

Or are their form ID's changing as they level? (If they level, don't understand followers well enough yet)